I really like animosity, I think it is what really makes the army for me and while I enjoy the fruits of not having to test for it in my Kings of War army, I miss that feeling that I am really leading Orcs and not human barbarians painted green.

So, with that out of the way, what about only rolling for Animosity if you want a unit to do something other than March or Charge?

So no more testing at the beginning of the turn, the only real problem I see is keeping track of units that do nothing. So I guess an Orc turn would be, declare charges, move marching units, test for holding/reforming/sidling units.