willpower isn't a stat. Intellectual ability has nothing to do with willpower. Go to a college campus and you'll see many smart people that won't hold thier ground at all. Wisdom isn't a factor in willpower or more holy people would rule religions than Ideologues. Charisma isn't willpower it's the ability to convince people that your way is best.
You'd have to create another stat or continue to just let people roll play thier characters. But I'd argue if you want to add a willpower stat then you need a perception stat and do away with the skill.
You'd have to create another stat or continue to just let people roll play thier characters. But I'd argue if you want to add a willpower stat then you need a perception stat and do away with the skill.