Nobody likes waiting for a DF party to fill. Sure, you can do some other stuff like craft, gather and the like but mostly, you just do nothing.

I'd like the ability to queue for multiple DF parties. For example, maybe queue up my Brd for my weekly Ifrit, Brd again for weekly Titan, Brd again for weekly Garuda, my Whm for CT and my Drg for low level dungeon roulette. First one that fills is the one I take (which auto cancels the others of course). That should result in faster fills for everyone.

Less waiting, more playing.