As usual with AWS (or anything I guess) there's more than one way to accomplish a particular goal. How much of Amazon's Elastic Container Service is replicated by Docker for AWS? I'm currently using ECS + Docker but this looks potentially simpler.
Our goal for this project was to keep it as simple as possible. We tried to only use standard AWS features (CloudFormation, EC2, Autoscaling groups, VPC, ELB, etc) and we are using Docker 1.12 out of the box, with no changes.
All of the scheduling is handled in the docker engine itself, so we didn't need to add anything outside of that.
This version is pretty much an MVP, and we hope that the beta testers will help us test it out, and guide the future direction of the project.
Me, I'd rather use what's available than self-host more often than not, but depends on the use-case.