At the moment in the gameplay videos I didnt saw any wavering Lines due to Moral hit, it was pretty same like Warband some clashing lines, Cavalry had almost no impact, in the Sandbox gameplay as I saw when they attacked and slaughtered the Infantry the enemy formation kept going towards the players line despite the heavy loses as you can see in the kill feed, they startet only to flee when they where already only a couple of guys left. I hope at that point that the Morale System wasnt fully fleshed out quiet yet but I dont see any difference towards Warband at the moment but keep in mind its my personel perspective others could see this differently.