I get consolidating communities that are literally clones of each other but none of your examples fall under that for me.
What is the different between "let's talk about games" and "askgaming"?
What if someone tries the Fediverse for the first time, sees that their niche sub exists and is faced with a “SUB LOCKED” message?
They wouldn't only see a "sub locked", they would see "go to !othercommunity!"
Examples:
This shows new joiners where the active community is, which seems better than having them conclude that the communities (and thus the platform as a whole) is inactive