Is it odd that no one from the company has responded to this in two days? I don't suggest "entertaining" responses. Rather, they could have chosen a particular complaint or two and said, "here's how things will work differently going forward, and here are the new issues in our tracker that reflect this commitment".

It could be that they just haven't seen this. No one was @-ed.

ISTM coreos/rkt may be the way to go for subuser. In my admittedly-shallow tests, it seemed simpler, easier, and better than docker, and it can consume docker files.