my suggestion is that instead of having to manually switch to the class you queued up as you can accept it as any and it auto switches you as you enter the dungeon. I just ran into a pretty annoying problem where I was queued up as a bard and doing fates as my white mage. Queue pops up and i couldn't get out of combat in time to switch and got aggroed by a few mobs while trying to run away to accept it -.-;;. Ended up missing it.