While I agree that a forfeit option would be awesome, I would like to point out that I've never missed a queue pop because of TT. I've had a queue pop the moment I started a TT match, and I was still able to randomly play cards fast enough to accept the queue before it went away. Playing randomly is like forfeiting, except vs NPCs, you might still win (their AI is pretty terrible at times). If you're having trouble accepting queues on time due to being in the middle of a TT match, you should really stop playing seriously the moment it pops and just throw down cards in available spots asap to get through the game.