Using commands for these "units" would make them not only hard to control, but also extreemly hard to make. I love the idea, but it would be impractical to lead an army of units by telling each one of them a certain command...
If we had a command like
NPC Code:
setfocus2 level,x,y;
and maybe a command to set the zoom of the player so they could see about 4 levels at once, the mouse could be used to control the units or something, similar to Starcraft, Warcraft, and those other games.