Is there any plans for a rotoshape node in the new COPS?
I would say that this one is pretty necessary, even on the old one which was very buggy I was using a lot.

Since first iteration of COPs was not aimed for compositing its missing a lot of compositing specific nodes and workflows

But since missing roto/paint is one of the acknowledged limitations here https://www.sidefx.com/docs/houdini/copernicus/index.html [www.sidefx.com]
You can be almost certain that it's planned to be adressed

I am really glad to know about that this such great news!