This is coming from a DH veteran who's played countless games as Germany, but I can't figure out for the life of me why you would want to release the Reichskommisariats? Germany needs the resources and IC taken from the Soviets if they're ever going to stand up to the USA, and the RKs would just remove the IC/resources from your direct control. I can't figure it out from the puppet angle either, as Germany will have plenty of those by this point.
Unless you get to eventually integrate them into the Reich itself, I don't see much point in releasing them.
Unless you get to eventually integrate them into the Reich itself, I don't see much point in releasing them.