It have been over 6 months since last update. We have been waiting patiently for the features in update 3 and 4 form the roadmap. Will they ever come?
We will soon have to decide if we should go for a different solution.
Plesk Multi Server is not in active development right now since our team is focused on delivery of main product release and improving the features like Let's Encrypt and Advisor. But we are still planning to deliver the new updates to this project. I have no exact ETA but this all information that I can provide.