I know this idea has come up once or twice before, including the youtube stream yesterday, and it might be quite technically challenging to implement, but…
I would really really love to see a multi-headed warrior that can emit more than one stream of fire, one per head, graphically coming from each head. Imagine flying your favorite warrior, using two - TWO!- fingers at the same time, heads swiveling independently like the eyes of a deranged old world chameleon, hitting two non-adjacent targets at once.
For game balance purposes, I imagine each stream would have to do half the damage a single stream dragon would do, but the streams could be combined on the same target using two fingers close together, or a single finger like current warriors. Kinda like crossing the streams in Ghostbusters. lol.
Hunters already have multi-shot capability limited only by shot energy and the number of fingers a player can bring to bear, so there really isn’t any reason to change there.
Sorcerers could in theory target with two simultaneous finger swipes I suppose, but as with warriors would likely have to be balanced by decreased damage per shot to make up for the increase in total number of shots/sec.
edit: proofreading fail. corrected.