Respect for your mod, and all that.
But yeah, that's what this game needs: more god-mode! /sarcasm Seriously, it's as good as impossible to die in this game as it is. By the time you're half-way thru the game, all dmg modifiers are set to 0.00 already; and the only thing that can still harm you (short of getting blown up in a tank or something) is a brute attacking you -- and even then you can probably still brew some coffee first, before you actually die.
Your beef is a problem with the damage modifier upgrades, and not the weapons. Removing the upgrades with Corrodias' save editor is the key to actually having fun again. Also, the vanilla STAG weapons are severely underpowered. This mod is a great step in the right direction to fix that.
Tried to install it, but weapons.xtbl actually seems to contain a huge list of weapons (and their stats). Won't they interfere with stats for upgraded weapons and all?
Only when weapon_upgrades.xtbl is untouched.