Hygiene... honestly, I don't see the point. I mean, you're in the wasteland; one of the main themes is that there's very little drinking water; no one's going to waste it washing themselves constantly. A bath is like a celebration

Even if it's implemented, I don't remember feeling dumber last time we had the water cut in my building, so I don't understand the penalty to intelligence, though a penalty to poison resistance would make a lot more sense to me.
The whole idea behind make it RP-based is what I like, but it shouldn't be overdone, imo.