There have been some strides made in implementing CRI-O compliant runtime engines. CoreOS (now owned by Red Hat) created rkt as a container runtime that improves on the security and standardization over docker.
Since EDCOP generally standardizes on CentOS/RHEL, it may make sense to implement rkt as the container runtime engine for EDCOP. A design proposal would be necessary to outline the advantages/disadvantages of implementing rkt over docker, and how to do it.
Some differences are outline in this CoreOS Blog Post, although these are likely biased toward rkt.