It get's worse, I hope this is seen and fixed. You can apparently set the guard value since it is also client side, and using the feat Reckless Attacker which gives power based on guard, effectively one shot things.
Posting this here so it hopefully is seen, since apparently the only way to get fixes is get them abused. Reckless Attacker + Cheat Engine and set guard value to something absurd and you have a new GF one shot.