One issue might be that users lose some control over which communities they see content from. If [email protected], [email protected], and [email protected] are all connected in this way, but I despise something about [email protected], I can’t follow either of the others?
Which could be solved by a toggle on the community. The next question then would be what the default is, and I think more content would be better than less.
The last issue is how much more confusing this will be for new users, which I don’t know how to solve because I don’t quite understand it myself