i think plate should be reduced, but fabric and other armor types should be more sturdy. however when you do meet plated opponents, they should be very robust. also yees the cost of plate armor is not high enough, and also now you get way more groschen so it offsets the price as well. the realism of the game is, relative to everything else, vastly superior. but it’s not perfect and there are still contrivances.
a realism mod should reduce the amount of plated bandits, enhance the armor protection of all armor, but especially plate, increase the utilization of polearms, make a full suit of plate armor somewhere in the 20kg range if not more instead of what it is now. someone in henry’s station and position essentially being an emissary/messenger/spy for his lord really shouldn’t be wearing anything else than basic frabic, chain, and some type of simple plate components on his arms and legs. but yeah it would be too prohibitive and cause an outcry if only high status npcs could wear plate. just make it prohibitively expensive