It would be nice if you could create or join a game and save your teammate's spot when you join. Perhaps they would have 1 day or the games time limit to join or get booted (similar to a tournament game starting). This would make it easier to start team games outside of the tournament arena.

would be awesome.  Also would make a decent premium feature if Tom is looking for things that provide convenience, but not an in-game advantage.

+1 as long as there is a timeout so other players can join after a certain amount of time.