Power armor should have insanely high poison resistance by default. There should be an antidote item to remove poison damage. And there should be no amount of poison that out damages a deathclaw's hardest hitting swing on survival.

Or just having a cure for mole rat disease would be enough for me. Silly why you can't do anything about that.

Poison resistance is very lacking in this game. As far as I know there aren't even any poison resistant consumables - if there are it is far too rare.

And yes endurance should either have increasing poison resistance per level up, or it there needs to be a perk/perk rank related to it.

There is some crude way of poison cure: pumping stimpacks into your body. It would be nice if some endurance and/or endurance perk would also include poison resistance.

Because otherwise the weight of your choice doesn't matter if ya can just cure it anyway.