As an owner and admin for clubs I would love the ability to add polls, pin posts and have the activity feed work like a forum with active posts at the top and not sorted by time. Also need a way to arrange text better like code where lines have x character spaces and not based on the size of the letter sums (hard to make leaderboards). Allow custom backgrounds. This would help a lot. Also a way to notify the entire group via notification would be nice if not abused/optional.
I love your ideas bro. We NEED things like this. Polls and ability to pin posts most importantly. There is no way to Get important information out to your members and the activity feed is so zoomed in that you can barely see 2 posts.
A good tab for polls would be "Club votes" or Clubmunity" where the past vote stats are seen.