I have idea for crushtrough balance
Depending on weapon type you have, crushtrough would take different amount of dammage,
Polearms-------------------2%-10% of max amount of damage depending on your strenght, you wont be stun.
shield users---------------35%-50% of max amount of damage depending on your strenght, you wont be stun
2h/1h without shield-----50%-100% of max amount of damage depending on your strenght, you get stun
EDIT
i dont know why i posted this in general discussion, so if any admin can move it to suggestion corner thanks