I've stated in my article that:
Really, what good is a Swiss knife approach to the ammo and consumables system when the game is too easy? Give a game a rocket-firing shotgun, medikits and regeneration potions that can be crafted, a pistol that can double as a medium-range sniper rifle, a built-in defibrillator, and a ridiculously timid AI and you get a character that’s well-nigh invincible. The regeneration potions are overkill, given that you already have a regenerating body courtesy of the nanites that have been injected into your system when you submitted yourself to the Ark project.
Hopefully id Software will release another patch that will rectify this.
Just make the AI fire more often and that will solve 80% or more of the issue.