Give players incentive to play tanks and healers in Content finder
Since content finder will be one of the major ways people do content in ARR there is bound to be a few problems that pop up with it. I can see one already.
In WoW which has dungeon finder there is a big problem with people not wanting to take on the responsibility to play tanks and healers, they rather play mindless dps. So if your a tank or healer you get a instant queue really fast. While DPS have to wait like 30 min. So Blizzard started bribing people with bonus bags that had a lot of gold, food, potions, mounts and pets if they successfully beat a dungeon as a tank or healer. So now it only takes 8 min for dps to get a group.
So devs fix the problem before it happens in ARR. Give the tanks and healers a bag with extra gil and chance a rare mount for queuing up in the content finder. It will reduce queue times for those dps players by a lot. Win-Win for everyone.