Add a personal card ban list to decks so that you aren't matched against decks you are just going to auto-concede against.

Some cards in brawl are just such a direct hard-counter to my deck that it's not a fair match or reasonable to want to play against.

Having to wait on a match, play half-way through the match, just to have to auto-concede because the player dropped the one card that just shuts down my deck is not fun.

Plus, I just hate playing against blue. It's the most broken and annoying color in MTG history.