This is a list of ideas/tasks that will improve the code base after the move to symfony

• Inject dependencies (use cases, presenters, validators) into controllers as constructor dependencies instead of injecting the factory
• Replace TwigFactory and twig instances for creating mails with service definitions
• Use _format for ListCommentsController
• Replace "EnvironmentBootstrapper" and its factory classes with service definitions for the different environments and rely on Symfony's dependency injection