Small suggestion, take away the option to withdraw once a party is formed for any dungeon or raid, i am sick to death of being in queues for 40mins+ as a TANK and people withdrawing as the parties are formed.

For example today, i was in a queue for Syrcus tower as my Warrior for 1 hour 22mins, and the party was formed, i counted, 23 times, and someone always withdrew, not sure if they do this deliberately, but it happens a lot...too much.

If you can't take away the withdraw option then make a time lockout, for example, if they withdraw once a party is formed, first time is 5mins, then 10mins, 20mins, 30mins and so on.