It sounds like your development is focused on containers, and perhaps Copilot is best for that. AWS CDK works very well when your application is based on many different kinds of cloud resources that need to be connected together, utilizing all the serverless and managed features of AWS.
Copilot supports serverless too (App Runner, serverless Aurora, DynamoDB, S3, CodePipeline etc). But if your app is using a huge nr of AWS features, you're probably over engineering it.
Sure it's opinionated enough that it won't fit every use case people have on AWS, but in most cases for new apps it's good.
