A new archery system, i have always feared the archers with my life, unless i had a board shield, because no armor can protect you from a short bow, not even plate, you will probably die at most in three shots if it hits your armoured parts, usually you die in like two and i have always found it weird that community was alright with it, i suppose to stop the two handed superiority they were alright with it. That is why i hope that one handed weapons and shields get more power in Bannerlord, a bit tired to see two handed weapons streamroll anything, if they were so good they wouldn't have used sword and shield so much back then you know.
Either way, for now i feel like bannerlord needs more physics and better hitboxes, so people cannot just spaz out like they were on excessive amount of crack, you can call it skill, but i call it a bit of an exploit, that is why duels end so quickly.
But my biggest suggestion would be to increase the hitpoints, after playing this game for 4.697 hrs, i feel like you just die a bit too quick and thus even massive battles end in like 20 seconds at most, unless the team retreats. Getting two shot by a short bow or getting two hit by an arming sword through your mail armor always pissed me off, i want to trust my armour at certain situations and that might sound bad but i just feel like health or armour is a bit lacking.