[Loren]

Yeah, I forgot safe archers. An order Fire/Safe--it won't shoot if there's any reasonable chance of an arrow hitting a friendly unit.

Another one: An order "Close". It would always be followed by some other order. It would mean to get close enough to carry out the next order. If you were in range it would do nothing.

One little one that could easily be done with a patch even: Ask only once if you're attempting to move troops you can't. (Immobile, or land/water problems.)