Personally, I would focus on the 75-80% of cases where you don't need things like ECS, Kubernetes etc etc. Give me a simple choice to setup either a low traffic web site/app (perhaps a single EC2 running say a framework) and do all the goodies like SSL, DB provisioning for me. or give me a choice to setup a bit more highly available site which uses Load balancers with couple of EC2 servers and boom. Don't overcomplicate.

I am literally trying to solve a problem in AWS Infra right now where I want to setup PHP/Laravel apps on demand and all the tools that exist are way too complicated. I want a simple UI that asks me for the domain, github repo and a couple of questions (db/cache etc) and then boom. It setups the site.