Bash & Crush vs. Cut & Slash

[Novi]

It occurred while playing MA Ulm - why don't heavy blunt weapons such as maces, morningstars, flails, mauls etc. have some armour-piercing bonuses?

In late middle ages, with the rise of plate armour, the use of swords dwindled and blunt weapons became prevalent. Cutting weapons were practically useless against steel-clad soldiers, but blunt weapons, despite their clumsiness, proved to deal with the obstacle quite efficiently - a strike with a warhammer might not have punctured the steel plating but it DID do a sufficient amount of damage just through the force of the impact.

I realize that adding armour-piercing feat to these weapons might offset the game balance, but perhaps, for the sake of truth, some kind of change could be done?