There were certainly ways to de-shell a knight. This early tin opener was based on a pole-arm used for that purpose. The action is the same although the original had a lot more blood and screaming during use.
The anti warrior for the Heavy British Knight on a horse was the exactly opposide
Small men without armour and only a dagger
They used the enemys horse as cover, stabs the horse, and ten they killed the Knight by stab in the eyes
So far i read it, sounds not really safe ^^
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Because we have a game and it needs not to be 100% realistic i think there should be 3 Classes of enemys
1: Normal enemys = No Drawbacks or Benefits
2: Armored Zombies = Military, Behemoth...
Good weapons = 7,62 Weapons, Spiked Weapons, Crossbow, and Knife (Knifes because you stab the weak points)
3: Zombies with much puffer zone = Cops, Fat Ladys, Hawayan, Bears ...means 50% damage from all other weapons on the body
Good weapons = (Machete ?), Magnum, Shotgun ...
Finally every player should be able to use his Favourite weapon but a good mix should help well.
But as i said, i still think how i would make it
luckily i have time, before i proceed with my mod i need to finish my Prefabs.