Although a nice though, it wouldn't really work for all classes. For Locks or Mages, whose CC affects a large assortment of mobs, not all spells do. Mind Control a superior form of CC -- however, can only be used on Humanoids. So, if Shaman's, Locks or mages, for example, could Queue as both DPS and CC, it would knock the other 'DPS only' jobs further back in the queue.
Interesting idea though. =)