Gammadoodler
Hero
Yep. The following paragraphs are implementation ideas.Literally the next paragraph talks about eliminating the importance of armor.
You think reducing armor would provide mechanical reinforcement for a near-modern setting.
You could have put any proposed mechanical change in those paragraphs. Rules for manned spaceflight and GPS. Elimination of HP. Mechanical implementation of various economic systems. And they could do a better or worse job of achieving your design goals.
I happen to think that the reduction in armor effectiveness isn't essential for what you are trying to achieve, specifically as far as dungeon delving is concerned.
Like I'd agree that walking onto the battlefield at Gettysburg in full-plate is unlikely to help your chances, but if you're going into an ancient crypt to fight an ancient Pharoah and his undead guards, maybe it makes sense to bring tougher attire than just some shirtsleeves and a cravat to deal with the cursed swords, poison darts, werecreature bites and the like that you might expect to encounter there.