More and more questions and threads about the current RMU are appearing so I think we should have a new subforum for them (and move all such threads into it). As for the beta forum, it may be better to keep it read-only as I think it'd be counter-productive to leave it open to discuss what is already released.
Having people posting and asking questions in the beta forum about released rules only makes it harder to find anything relevant, now and the more time pasts, when searching a specific topic.