At Schezzle (https://schezzle.com) we use docker swarm on AWS.

The build jobs creates images that are published to ECS repositories, and there are auto scaling groups that add and remove engine hosts to and from ALB target groups for each deployed service. It makes service discovery, scaling, etc. really easy.

Definitely try swarm out if you haven't already. 1.12 was good, 1.13 is amazing (secrets, health-based VIP membership, etc).