This would makes maces completely useless to player. Enemies do have perks and you have no way of checking what they have. So you will never be able to rely on stun.
I already find maces sub-par. Orcs are not stunnable, undead ignore fatigue damage, goblins are hard to hit and die before fatigue becomes issue for them. So it’s basically anti-human weapon, which is too narrow to be worth specializing in.
