My suggestion is to make the entire "quick join" process in PvP blind - at least for 1v1 dueling. By blind, I mean do not show names or schools of people waiting in the queue and do not reveal the opponents to each other until after the inital 10-second countown in the arena.
I am suggesting this because I see quite a bit of deck manipulation against opponents at the higher ranks. It is fairly easy to memorize the names of regular like-rank opponents (or have just faced an opponent), gear your deck towards their school, jump into the queue, and be reasonably assured that you will face that opponent.
