diff --git a/src/commands/convert.ts b/src/commands/convert.ts
index 3e6d4955a6c..1530c6ffa2d 100644
--- a/src/commands/convert.ts
+++ b/src/commands/convert.ts
@@ -7,6 +7,7 @@ import { load } from '../models/SpecificationFile';
 import { SpecificationFileNotFound } from '../errors/specification-file';
 import { convert } from '@asyncapi/converter';
 import type { ConvertVersion } from '@asyncapi/converter';
+import { cyan, green } from 'picocolors';
 
 // @ts-ignore
 import specs from '@asyncapi/specs';
@@ -35,15 +36,16 @@ export default class Convert extends Command {
     try {
       // LOAD FILE
       this.specFile = await load(filePath);
+      // eslint-disable-next-line sonarjs/no-duplicate-string
       this.metricsMetadata.to_version = flags['target-version'];
 
       // CONVERSION
       convertedFile = convert(this.specFile.text(), flags['target-version'] as ConvertVersion);
       if (convertedFile) {
         if (this.specFile.getFilePath()) {
-          this.log(`File ${this.specFile.getFilePath()} successfully converted!`);
+          this.log(`🎉 The ${cyan(this.specFile.getFilePath())} file has been successfully converted to version ${green(flags['target-version'])}!!`);
         } else if (this.specFile.getFileURL()) {
-          this.log(`URL ${this.specFile.getFileURL()} successfully converted!`);
+          this.log(`🎉 The URL ${cyan(this.specFile.getFileURL())} has been successfully converted to version ${green(flags['target-version'])}!!`);
         }
       }
 
@@ -64,9 +66,11 @@ export default class Convert extends Command {
           type: 'invalid-file',
           filepath: filePath
         }));
+      } else if (this.specFile?.toJson().asyncapi > flags['target-version']) {
+        this.error(`The ${cyan(filePath)} file cannot be converted to an older version. Downgrading is not supported.`);
       } else {
         this.error(err as Error);
       }
-    }
+    } 
   }
 }
diff --git a/src/commands/new/file.ts b/src/commands/new/file.ts
index fc5544269bc..52964b66763 100644
--- a/src/commands/new/file.ts
+++ b/src/commands/new/file.ts
@@ -5,6 +5,7 @@ import * as inquirer from 'inquirer';
 import { start as startStudio, DEFAULT_PORT } from '../../models/Studio';
 import { resolve } from 'path';
 import { load } from '../../models/SpecificationFile';
+import { cyan } from 'picocolors';
 
 const { writeFile, readFile } = fPromises;
 const DEFAULT_ASYNCAPI_FILE_NAME = 'asyncapi.yaml';
@@ -158,16 +159,16 @@ export default class NewFile extends Command {
     try {
       const content = await readFile(fileNameToWriteToDisk, { encoding: 'utf8' });
       if (content !== undefined) {
-        console.log(`File ${fileNameToWriteToDisk} already exists. Ignoring...`);
+        console.log(`A file named ${fileNameToWriteToDisk} already exists. Please choose a different name.`);
         return;
       }
     } catch (e:any) {
       if (e.code === 'EACCES') {
-        this.error('Permission denied to read the file. You do not have the necessary permissions.');
+        this.error('Permission has been denied to access the file.');
       }
     }
     await writeFile(fileNameToWriteToDisk, asyncApiFile, { encoding: 'utf8' });
-    console.log(`Created file ${fileNameToWriteToDisk}...`);
+    console.log(`The ${cyan(fileNameToWriteToDisk)} has been successfully created.`);
     this.specFile = await load(fileNameToWriteToDisk);
     this.metricsMetadata.selected_template = selectedTemplate;
   }
diff --git a/src/commands/new/glee.ts b/src/commands/new/glee.ts
index 9d91fa297ad..f717ac7ced6 100644
--- a/src/commands/new/glee.ts
+++ b/src/commands/new/glee.ts
@@ -9,10 +9,32 @@ import { prompt } from 'inquirer';
 // eslint-disable-next-line
 // @ts-ignore
 import Generator from '@asyncapi/generator';
+import { cyan, gray } from 'picocolors';
+
+export const successMessage = (projectName: string) =>
+  `🎉 Your Glee project has been successfully created!
+⏩ Next steps: follow the instructions ${cyan('below')} to manage your project:
+
+  cd ${projectName}\t\t ${gray('# Navigate to the project directory')}
+  npm install\t\t ${gray('# Install the project dependencies')}
+  npm run dev\t\t ${gray('# Start the project in development mode')} 
+
+You can also open the project in your favourite editor and start tweaking it.
+`;
+
+const errorMessages = {
+  alreadyExists: (projectName: string) =>
+    `Unable to create the project because the directory "${cyan(projectName)}" already exists at "${process.cwd()}/${projectName}". 
+To specify a different name for the new project, please run the command below with a unique project name:
+
+    ${gray('asyncapi new glee --name ') + gray(projectName) + gray('-1')}`,    
+};
 
 export default class NewGlee extends Command {
   static description = 'Creates a new Glee project';
   protected commandName = 'glee';
+  static readonly successMessage = successMessage;
+  static readonly errorMessages = errorMessages;
 
   static flags = {
     help: Flags.help({ char: 'h' }),
@@ -93,12 +115,10 @@ export default class NewGlee extends Command {
         fs.existsSync(PROJECT_DIRECTORY) &&
         fs.readdirSync(PROJECT_DIRECTORY).length > 0
       ) {
-        throw new Error(
-          `Unable to create the project. We tried to use "${projectName}" as the directory of your new project but it already exists (${PROJECT_DIRECTORY}). Please specify a different name for the new project. For example, run the following command instead:\n\n  asyncapi new ${this.commandName} -f ${file} --name ${projectName}-1\n`
-        );
+        throw new Error(errorMessages.alreadyExists(projectName));
       }
     } catch (error: any) {
-      this.error(error.message);
+      this.log(error.message);
     }
   }
 
@@ -199,9 +219,7 @@ export default class NewGlee extends Command {
       } catch (err: any) {
         switch (err.code) {
         case 'EEXIST':
-          this.error(
-            `Unable to create the project. We tried to use "${projectName}" as the directory of your new project but it already exists (${PROJECT_DIRECTORY}). Please specify a different name for the new project. For example, run the following command instead:\n\n  asyncapi new ${this.commandName} --name ${projectName}-1\n`
-          );
+          this.error(errorMessages.alreadyExists(projectName));
           break;
         case 'EACCES':
           this.error(
@@ -234,9 +252,7 @@ export default class NewGlee extends Command {
           `${PROJECT_DIRECTORY}/README-template.md`,
           `${PROJECT_DIRECTORY}/README.md`
         );
-        this.log(
-          `Your project "${projectName}" has been created successfully!\n\nNext steps:\n\n  cd ${projectName}\n  npm install\n  npm run dev\n\nAlso, you can already open the project in your favorite editor and start tweaking it.`
-        );
+        this.log(successMessage(projectName));
       } catch (err) {
         this.error(
           `Unable to create the project. Please check the following message for further info about the error:\n\n${err}`
diff --git a/src/models/Studio.ts b/src/models/Studio.ts
index 37835075db5..d2ed51837dc 100644
--- a/src/models/Studio.ts
+++ b/src/models/Studio.ts
@@ -7,6 +7,7 @@ import chokidar from 'chokidar';
 import open from 'open';
 import path from 'path';
 import { version as studioVersion } from '@asyncapi/studio/package.json';
+import { gray } from 'picocolors';
 
 const { readFile, writeFile } = fPromises;
 
@@ -99,7 +100,8 @@ export function start(filePath: string, port: number = DEFAULT_PORT): void {
 
   server.listen(port, () => {
     const url = `http://localhost:${port}?liveServer=${port}&studio-version=${studioVersion}`;
-    console.log(`Studio is running at ${url}`);
+    console.log(`Studio is now running at ${url}.`);
+    console.log(`You can open this URL in your web browser, and if needed, press ${gray('Ctrl + C')} to stop the process.`);
     console.log(`Watching changes on file ${filePath}`);
     open(url);
   });
diff --git a/src/parser.ts b/src/parser.ts
index 0f5f3bece81..4c1371ac196 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -1,12 +1,13 @@
 import { AvroSchemaParser } from '@asyncapi/avro-schema-parser';
 import { OpenAPISchemaParser } from '@asyncapi/openapi-schema-parser';
-import { Parser, convertToOldAPI } from '@asyncapi/parser/cjs';
+import { DiagnosticSeverity, Parser, convertToOldAPI } from '@asyncapi/parser/cjs';
 import { RamlDTSchemaParser } from '@asyncapi/raml-dt-schema-parser';
 import { Flags } from '@oclif/core';
 import { ProtoBuffSchemaParser } from '@asyncapi/protobuf-schema-parser';
 import { getDiagnosticSeverity } from '@stoplight/spectral-core';
 import { OutputFormat } from '@stoplight/spectral-cli/dist/services/config';
 import { html, json, junit, pretty, stylish, teamcity, text } from '@stoplight/spectral-formatters';
+import { red, yellow, green, cyan } from 'chalk';
 
 import type { Diagnostic } from '@asyncapi/parser/cjs';
 import type Command from './base';
@@ -102,9 +103,10 @@ function logDiagnostics(diagnostics: Diagnostic[], command: Command, specFile: S
 }
 
 export function formatOutput(diagnostics: Diagnostic[], format: `${OutputFormat}`, failSeverity: SeverityKind) {
-  const options = { failSeverity: getDiagnosticSeverity(failSeverity) };
+  const diagnosticSeverity = getDiagnosticSeverity(failSeverity);
+  const options = { failSeverity: diagnosticSeverity !== -1 ? diagnosticSeverity : DiagnosticSeverity.Error };
   switch (format) {
-  case 'stylish': return stylish(diagnostics, options);
+  case 'stylish': return formatStylish(diagnostics, options);
   case 'json': return json(diagnostics, options);
   case 'junit': return junit(diagnostics, options);
   case 'html': return html(diagnostics, options);
@@ -115,6 +117,30 @@ export function formatOutput(diagnostics: Diagnostic[], format: `${OutputFormat}
   }
 }
 
+function formatStylish(diagnostics: Diagnostic[], options: { failSeverity: DiagnosticSeverity }) {
+  const groupedDiagnostics = diagnostics.reduce((acc, diagnostic) => {
+    const severity = diagnostic.severity;
+    if (!acc[severity as DiagnosticSeverity]) {
+      acc[severity as DiagnosticSeverity] = [];
+    }
+    acc[severity as DiagnosticSeverity].push(diagnostic);
+    return acc;
+  }, {} as Record<DiagnosticSeverity, Diagnostic[]>);
+
+  return Object.entries(groupedDiagnostics).map(([severity, diagnostics]) => {
+    return `${getSeverityTitle(Number(severity))} ${stylish(diagnostics, options)}`;
+  }).join('\n');
+}
+
+function getSeverityTitle(severity: DiagnosticSeverity) {
+  switch (severity) {
+  case DiagnosticSeverity.Error: return red('Errors');
+  case DiagnosticSeverity.Warning: return yellow('Warnings');
+  case DiagnosticSeverity.Information: return cyan('Information');
+  case DiagnosticSeverity.Hint: return green('Hints');
+  }
+}
+
 function hasFailSeverity(diagnostics: Diagnostic[], failSeverity: SeverityKind) {
   const diagnosticSeverity = getDiagnosticSeverity(failSeverity);
   return diagnostics.some(diagnostic => diagnostic.severity <= diagnosticSeverity);
diff --git a/test/integration/convert.test.ts b/test/integration/convert.test.ts
index 29c52d0a599..64c72ad1f9d 100644
--- a/test/integration/convert.test.ts
+++ b/test/integration/convert.test.ts
@@ -32,7 +32,7 @@ describe('convert', () => {
       .stdout()
       .command(['convert', filePath])
       .it('works when file path is passed', (ctx, done) => {
-        expect(ctx.stdout).to.contain('File ./test/fixtures/specification.yml successfully converted!\n');
+        expect(ctx.stdout).to.contain('The ./test/fixtures/specification.yml file has been successfully converted to version 3.0.0!!');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -52,7 +52,7 @@ describe('convert', () => {
       .stdout()
       .command(['convert', 'http://localhost:8080/dummySpec.yml'])
       .it('works when url is passed', (ctx, done) => {
-        expect(ctx.stdout).to.contain('URL http://localhost:8080/dummySpec.yml successfully converted!\n');
+        expect(ctx.stdout).to.contain('The URL http://localhost:8080/dummySpec.yml has been successfully converted to version 3.0.0!!');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -73,7 +73,7 @@ describe('convert', () => {
       .stdout()
       .command(['convert'])
       .it('converts from current context', (ctx, done) => {
-        expect(ctx.stdout).to.contain(`File ${path.resolve(__dirname, '../fixtures/specification.yml')} successfully converted!\n`);
+        expect(ctx.stdout).to.contain(`The ${path.resolve(__dirname, '../fixtures/specification.yml')} file has been successfully converted to version 3.0.0!!\n`);
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -159,7 +159,7 @@ describe('convert', () => {
       .stdout()
       .command(['convert', filePath, '-o=./test/fixtures/specification_output.yml'])
       .it('works when .yml file is passed', (ctx, done) => {
-        expect(ctx.stdout).to.equal(`File ${filePath} successfully converted!\n`);
+        expect(ctx.stdout).to.contain(`The ${filePath} file has been successfully converted to version 3.0.0!!`);
         expect(fs.existsSync('./test/fixtures/specification_output.yml')).to.equal(true);
         expect(ctx.stderr).to.equal('');
         fs.unlinkSync('./test/fixtures/specification_output.yml');
@@ -171,7 +171,7 @@ describe('convert', () => {
       .stdout()
       .command(['convert', JSONFilePath, '-o=./test/fixtures/specification_output.json'])
       .it('works when .json file is passed', (ctx, done) => {
-        expect(ctx.stdout).to.equal(`File ${JSONFilePath} successfully converted!\n`);
+        expect(ctx.stdout).to.contain(`The ${JSONFilePath} file has been successfully converted to version 3.0.0!!`);
         expect(fs.existsSync('./test/fixtures/specification_output.json')).to.equal(true);
         expect(ctx.stderr).to.equal('');
         fs.unlinkSync('./test/fixtures/specification_output.json');
diff --git a/test/integration/new/file.test.ts b/test/integration/new/file.test.ts
index 2fe078a860c..d957857d49f 100644
--- a/test/integration/new/file.test.ts
+++ b/test/integration/new/file.test.ts
@@ -26,7 +26,7 @@ describe('new', () => {
       .command(['new', '--no-tty', '-n=specification.yaml'])
       .it('runs new command', async (ctx,done) => {
         expect(ctx.stderr).to.equal('');
-        expect(ctx.stdout).to.equal('Created file specification.yaml...\n');
+        expect(ctx.stdout).to.equal('The specification.yaml has been successfully created.\n');
         done();
       });
 
@@ -36,7 +36,7 @@ describe('new', () => {
       .command(['new:file', '--no-tty', '-n=specification.yaml'])
       .it('runs new file command', async (ctx,done) => {
         expect(ctx.stderr).to.equal('');
-        expect(ctx.stdout).to.equal('Created file specification.yaml...\n');
+        expect(ctx.stdout).to.equal('The specification.yaml has been successfully created.\n');
         done();
       });
   });
@@ -62,7 +62,7 @@ describe('new', () => {
       .command(['new:file', '--no-tty', '-n=specification.yaml'])
       .it('should inform about the existing file and finish the process', async (ctx,done) => {
         expect(ctx.stderr).to.equal('');
-        expect(ctx.stdout).to.equal('File specification.yaml already exists. Ignoring...\n');
+        expect(ctx.stdout).to.equal('A file named specification.yaml already exists. Please choose a different name.\n');
         done();
       });
   });
diff --git a/test/integration/new/glee.test.ts b/test/integration/new/glee.test.ts
index 82a7f6587fb..a7ded8abade 100644
--- a/test/integration/new/glee.test.ts
+++ b/test/integration/new/glee.test.ts
@@ -4,6 +4,13 @@ import { PROJECT_DIRECTORY_PATH } from '../../helpers';
 import { expect } from '@oclif/test';
 
 const testHelper = new TestHelper();
+const successMessage = (projectName: string) =>
+  '🎉 Your Glee project has been successfully created!';
+
+const errorMessages = {
+  alreadyExists: (projectName: string) =>
+    `Unable to create the project because the directory "${projectName}" already exists at "${process.cwd()}/${projectName}". 
+To specify a different name for the new project, please run the command below with a unique project name:`};
 
 describe('new glee', () => {
   before(() => {
@@ -27,7 +34,7 @@ describe('new glee', () => {
       .command(['new:glee', '-n=test-project'])
       .it('runs new glee command with name flag', async (ctx,done) => {
         expect(ctx.stderr).to.equal('');
-        expect(ctx.stdout).to.equal('Your project "test-project" has been created successfully!\n\nNext steps:\n\n  cd test-project\n  npm install\n  npm run dev\n\nAlso, you can already open the project in your favorite editor and start tweaking it.\n');
+        expect(ctx.stdout).to.contains(successMessage('test-project'));
         done();
       });
   });
@@ -52,7 +59,7 @@ describe('new glee', () => {
       .stdout()
       .command(['new:glee', '-n=test-project'])
       .it('should throw error if name of the new project already exists', async (ctx,done) => {
-        expect(ctx.stderr).to.equal(`Error: Unable to create the project. We tried to use "test-project" as the directory of your new project but it already exists (${PROJECT_DIRECTORY_PATH}). Please specify a different name for the new project. For example, run the following command instead:\n\n  asyncapi new glee --name test-project-1\n\n`);
+        expect(ctx.stderr).to.contains(`Error: ${errorMessages.alreadyExists('test-project')}`);
         expect(ctx.stdout).to.equal('');
         done();
       });
diff --git a/test/integration/validate.test.ts b/test/integration/validate.test.ts
index d63921f4b6f..72d5bbbdc51 100644
--- a/test/integration/validate.test.ts
+++ b/test/integration/validate.test.ts
@@ -31,7 +31,7 @@ describe('validate', () => {
       .stdout()
       .command(['validate', './test/fixtures/specification.yml'])
       .it('works when file path is passed', (ctx, done) => {
-        expect(ctx.stdout).to.match(/File .\/test\/fixtures\/specification.yml is valid but has \(itself and\/or referenced documents\) governance issues.\n\ntest\/fixtures\/specification.yml/);
+        expect(ctx.stdout).to.contain('File ./test/fixtures/specification.yml is valid but has (itself and/or referenced documents) governance issues.\n');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -41,7 +41,7 @@ describe('validate', () => {
       .stdout()
       .command(['validate', './test/fixtures/specification-avro.yml'])
       .it('works when file path is passed and schema is avro', (ctx, done) => {
-        expect(ctx.stdout).to.match(/File .\/test\/fixtures\/specification-avro.yml is valid but has \(itself and\/or referenced documents\) governance issues.\n/);
+        expect(ctx.stdout).to.contain('File ./test/fixtures/specification-avro.yml is valid but has (itself and/or referenced documents) governance issues.\n');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -61,7 +61,7 @@ describe('validate', () => {
       .stdout()
       .command(['validate', 'http://localhost:8080/dummySpec.yml'])
       .it('works when url is passed', (ctx, done) => {
-        expect(ctx.stdout).to.match(/URL http:\/\/localhost:8080\/dummySpec.yml is valid but has \(itself and\/or referenced documents\) governance issues.\n\nhttp:\/\/localhost:8080\/dummySpec.yml/);
+        expect(ctx.stdout).to.contain('URL http://localhost:8080/dummySpec.yml is valid but has (itself and/or referenced documents) governance issues.\n');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -180,7 +180,7 @@ describe('validate', () => {
       .stdout()
       .command(['validate', './test/fixtures/specification.yml', '--log-diagnostics'])
       .it('works with --log-diagnostics', (ctx, done) => {
-        expect(ctx.stdout).to.match(/File .\/test\/fixtures\/specification.yml is valid but has \(itself and\/or referenced documents\) governance issues.\n\ntest\/fixtures\/specification.yml/);
+        expect(ctx.stdout).to.contain('File ./test/fixtures/specification.yml is valid but has (itself and/or referenced documents) governance issues.\n');
         expect(ctx.stderr).to.equal('');
         done();
       });
@@ -240,7 +240,7 @@ describe('validate', () => {
       .stdout()
       .command(['validate', './test/fixtures/specification.yml', '--fail-severity=warn'])
       .it('works with --fail-severity', (ctx, done) => {
-        expect(ctx.stderr).to.include('\nFile ./test/fixtures/specification.yml and/or referenced documents have governance issues.\n\ntest/fixtures/specification.yml');
+        expect(ctx.stderr).to.contain('File ./test/fixtures/specification.yml and/or referenced documents have governance issues.');
         expect(process.exitCode).to.equal(1);
         done();
       });