The axe looks like very OP weapon agree with you on that, as for the other things I'm pretty sure they will fix everything or improve it the game is not finished yet
Feints has been discussed to death here. https://forums.taleworlds.com/index.php/topic,369231.0.html What you are talking about seems to be creating the fog of war to confuse the enemy as to your real intentions. I doubt TW can implement such a thing unless their AI has received a substantial upgrade.
I think they left armor and other items in there for an idea the planned so im not sure they will hide some stuff in bannerlord,
But who knows we just need to wait.
Bigger battles will be neat, its good idea to have small and big battles so everyone will be happy.
Big battles in multi are epic its just so cool to fight large groups of the enemy.