Only natural in a slower paced realtime strategy game, we need the ability to queue up many smaller tasks so our character dont sit idle.
Also with crafting, you could very easily run yourself out of money quickly if you arent pay attention, so being able to specify how many of an item to create would be useful.
I'm sure you have this in the pipe sometime along with setting waypoints, but though I'd mention it so others could give some feedback as well.
