Shields and knockups need a change
Knockups are the only CC that cannot be properly cleansed unless you use a summoner or movement ability. There should be an animation for champions to quickly roll or stride to the direction they have clicked after cleansing a knockup or a crashing animation so they land and can move so it doesn't look choppy. Tenacity doesn't affect knockups either.
Shields/Barriers need an item counter. There should be a way to reduce their effects like Mortal Reminder does to healing. To itemize against both heals and shields, the passive should go to only one item. Thus, ADCs cannot build 80% critical strike with Mortal Reminder and a shield reduction item without losing a defensive item.
Thoughts?