Now first off I will state for the record that I prefer multishot to volley. It just fits the class better, hunters don't drop arrow like rain. It just doesn't happen.
But the problem we have now is that multishot is a single hit and costs too much focus. When we had volley we could channel the "spell" whilst still casting autoshot. The damage that each individual arrow caused was small, but a full 6 seconds of these little babys could mount up.
Now we have a single shot that will hit all mobs within 8 yards. Yes the initial damage is higher, but we can't spam this shot without costing too much focus and leaving us nothing but Steady to regain the focus back.
Are we going to see this ever changed. Probably not, but I would like to see Multishot replaced with what Explosive shot originaly was. You hit the first target and then the explosive ticks hit all other mobs within 8 yards for X amount of damage per 2 sec for 6 seconds. At least this would give us a semi useful AoE.