When will knock ups get reduced by tenacity?

i don't get how riot expects us to do sustained/prologue damage as a melee champion without going full tank whilst trying to deal with all the cc this game throws at you.

This game has gotten to the point where its all about being able to drop your payload within the short time frame you have when you aren't cced. forget about making good use of your attack speed. ranged champions can at least keep their distance. melee champs on other hand have to deal with it head on.

Played as akali vs leona, kalista, sejuani... even with mercs couldnt get to anyone. Knockup from kalista lasts too long followed by sej knockback...

would be nice if tenacity helped shorten them.

for those knockups/backs which you want to have last longer simply add a stun to it like you did to xin zhao or alistar.