- Best answers
Seems like a possibility, but also like a fast and cheap solution.Tended to be the case in Warband? Allowed weapons and armor to have differing interactions so not one weapon was best against every armor? Granted following the rest of your post two wrongs don't make a right, but that's one answer.
In history there were no weapons best against every armour, and if it was it would be a sword, which was an extremely expensive and hard to get weapon (which it should be in bannerlord as well). I think it shouldn't be that hard to balance the weapon types while maintaining a logical damage model as proposed by the OP.