Ok, so here's my laundry list. I'm going to use Chef terminology here, but this bleeds over to Docker, Salt, Puppet, etc.
Your stack creation product should force me to use best practices. I should specify the project type and you should do the following.
- prompt me for my source code repo
- set up apache/nginx/caching/db
- run my project
It'd be great for this to work out of the box for major frameworks like rails, django, pyramid, express