There seems to be some bugs around.
First, the peasant bowmen when firing uses the bows from Empire Archers.
There's an Exploit that when confederating with Bretonnia as another bretonnian faction gives Louen free upkeep for Questing vow and Grail Vow units.
Squires have splash VFX on charge.
(So far, all I can find on my first playthroughs. Please add more in the comments)