Voice acting is an unnecessary money sink. It actually takes life from the world since you will inevitably end up with a single actor doing multiple people. You get results like Bethesda games where some old man is the priest, the king, the bandit and the dog.
I was using a lot of archers and a square formation. It helps if you have a hill, not so much for the high ground but because the horse archers will be forced to attack you from specific directions instead of having a full circle around you.
If anything the current units should reorganized. Thinks like the Palatine guard have no place on the basic troop tree and the Sturgian troop tree is terrible. Before adding some wacky tabaccy two handed wielding horse archer, I'd rather they fix the current things.
Rather they keep it simple...