Moreso than what is mentionned in the OP, visibility is an issue for me.
I used to be able to browse through team threads fairly easily and see which were updated in a second, looking at the round table subforum.
Keeping up with what's going on is less enticing because of the additional maneuvering/existence of closed clubs. Because of that, I've noticed a drop in activity (posting, views, likes) in most team threads.
Might be just me though.
All I now know as far as teams go is that SASS is dead because Coolio smells.
Don't get me wrong, I like the idea of clubs & I don't have any easy solution to offer at this point in time.