Not 100% related, but someone made a point, that carrying more varied armors would be more interesting. It gave me idea of introducing some variance in armor's stats. There could be random drawbacks/qualities for common armors, like up to +50% of it's actual resistances for price of getting max 75% durabilty, increasing knockback, making you vunerable in other part of resistances, slowing you down by up to 10% or for getting -1 to it's def (of course all I mentioned could be took as the opposite, so +1 flat arm, up to +10% speed, 125% durability etc.). Some could have also uncommon resits on such armor, like up to 10% of acid resist (it wouldn't hurt, as it's rare and it would affect only barons of hell).
I share opinion, that tech are the least appealing mods and could be tweaked a bit.