Asking your companions and even slaves to move somewhere is nearly useless because they happily coming back to you once they reach their target.
A simple change: make companions and slaves wait there instead of coming back. Well, living beings can wander around that location but not coming back. And I can't justify at all undeads coming back on their own, they have to stand still there unless there was another order.

How this would improve the game? I would make [m]ove command finally useful.