invulnerability abilities should be on off invincibility to animation.

Fizz has a grace period coming down from e and fiora has a grace period where she can dash while riposting. Kayle ult is not like those two. Why the inconsistency riot? From my perspective all abilities that grant invulnerability should be cut and dry to the animations and vice versa. It is such a powerful mechanic we should to be able to see clearly when damage will be taken versus not taken.