I mean, power armor is bipedal tank suit. It's supposed to be impervious to small arms fire. Nothing short of armor penetrating rounds from a high powered rifle should be able to get through it. That means if I'm walking down the street and raiders are peppering me with shotgun blasts, assault rifle bursts, and handgun rounds, neither me nor my suit should take damage from that. I realize that *could* make the power armor OP against raiders, but that's the way it would really be and the way it was in the original games. The only things that should be of concern to someone in power armor are melee attacks from very strong enemies like deathclaws, high powered rifles, energy weapons, and explosives and even then, the suit parts should be damaged to "useless" before the person inside can be hurt. Like, if the right arm piece is all messed up from a grenade exploding nearby, then shots that hit you in the right arm would hurt you, but not anywhere since you still have full protection in other places.
I really hope this is the case in the stock game, but if not that's gonna be one of the very first mods I look for.