Yasuo windwall can't stop all cc

As a Yasuo player, i have found it annoying that when facing a teemo in any lane, whenever teemo's abilities is cast which blinds a champ when it is blocked by his windwall the damage and projectile are gone but the blind still takes effect. i find that frustrating and think its should be fixed seeing that when quinn's blind is blocked the blind doesn't take effect on Yasuo. Another thing which i believe should be changed is when playing vel koz against yasuo he can block your E projectile and damage but it can't stop the knock up, i don't fully understand why riot has decided to keep it that way but it'd make sense that if an ability is stopped the effects should not still continue. I play Yasuo and Vel Koz and i can find it unfair that you can still apply the E cc. which leaves there are probably other abilities that he can block but still take effect on him or his teammates, you can block a braum ult but not stopped the slow.