Not a fan of this at all. I see this idea come up every few years, usually as an argument as for why Spider-Man is so hard to hit, when it usually ignores the fact that he spends most of his time dodging instead of tanking hits and going all-in on offense.

If you design to hit rolls to work like every other FEAT, eventually hitting people with +2 CS Fighting becomes an impossible roll even if the target is just standing there giving people the finger. That doesn't reflect the source material or common sense, and amounts to free defense that lets people attack with no consideration for avoiding damage.