15 mins is fine by me but I wish they would add the 15 min penalty to before entering the instance too. If you queue and it pops up and you either dont accept or choose withdraw then you should be hit with the 15 minute penalty. Theres too many troll tanks out there that like to play around and queue and withdraw over and over to mess with everyone else thats queued. Dont know how many times I've had duty finder pop only to have the tank withdraw like 30 times before I finally get one that accepts. Tanks are getting out of control with the power they wield.