Fediverse

I would have thought "community groups" is the fix - let people group communities together, so you could have all Pokémon or Star Wars communities grouped or, simply, all communities of the same name/purpose.

Works fine as just a private consolidated feed, might get trickier if these were made public, so other people could subscribe to your curated group, because you'd then end up with dozens of pretty much the same thing.

edit: so the private feed would, essentially, be something like Mastodon's lists, for example.