Wouldn't their direct involvement go against what Xavier has been working for? Storm openly curing droughts could cause terror because she's displaying supernatural powers that the rest of humanity doesn't have and have no means to combat against if needed. And continually slicing off Logan's limbs would be the equivalent of torture. Just because he can heal a wound doesn't mean he doesn't experience the added pain.
individual weapons and tolls gain XP as you use them and when they level up they get more modifiers so instead of making a whole new tool or weapon u should replace the peace with the new component