Could probably do with sub-division roulettes covering certain level ranges for those who want to do content only within a certain expansion, with the caveat being that they still have to unlock all of the content they should have access to based on where they are in the MSQ. (So no cheesing by refusing to unlock something.)

Also give people the ability to queue for multiple roulettes at the same time, even if they have to do them all on the same role due to limitations.