Tenacity should give you a little armor/magic resist bonus if you are affected by airborn

Or any other kind of cc that it can't reduce the duration.

It can be as brief as the duration of the skill itself but would already be something.

We can remove the magic resist bonus from the boot to compensate and add a bigger bonus to the momentary effect.

It would make tenacity more useful as 54% of all cc are not affected by it and would make us nerf Irelia again, what would always be in the right direction.