Hi there! We have just released new version of Revision Manager TMC. From version 2.0.8 we will try to support the Gutenberg Project. As you my know it’s currently in deep development so we are having troubles hooking with it. Gutenberg itself has many bugs with capabilities ( for example user without permission to publish, can edit revision and accept it ).
In current version Revision Manager TMC copies post as draft, allows acceptance and merges changes with original. Custom metaboxes and plugins are also supported in Gutenberg’s view.
Your feedback is always welcome!