Being Untargetable/Invulnerable/Invincible etc.
All that bs needs to be taken out of the game. Something like Vlad's pool is understandable. He uses HP for it has a long cd and can still be caught by things such as tethers or effected by ignite.
BS like Kayle's ult or Fizz's E or Master Yi's Q all that stupidity needs to be taken out. There's so little counterplay to that bull