Thanks for the update and for the link to the reasoning -- I had completely missed it.
Based on the initial post (only mentioning defederation without linking to the Details), it sounded like the three servers had a falling-out of some sort, but this sounds reasonable. I can appreciate the difficulty of trying to maintain a welcoming environment.
From a user perspective, I think I'm mostly frustrated with the lack of visibility with these changes, specifically trying to keep track of what I do and don't have access to. I don't think that's the responsibility of beehaw to implement, but I might continue to look for solutions