I also really like Docker Compose. Where I think it struggles is when you have to get off the single node and on to network services. Then it starts to have less relevance. I know Swarm was meant to fix that, but I never tried it.

Conceptually, if I could just have an extra component to docker compose, where I install a little agent on to my nodes, I name my nodes (or nodegroups) in my d-c file as to what should go where, and have a master node that I do docker-compose up on, and I can represent an external service (e.g. AWS RDS) as a virtual service with an endpoint to connect to, and it all magically deploys, I think that would be incredibly powerful.

Maybe that was Docker Swarm, of course.