League's most overloaded ability

we all know exactly which ability i am talking about: Fiora's W : Riposte . This ability not only carries a lot of utility and damage and can be used just as well offensively as it can defensively. I mean not only can it be used for damage and also slow the atk speed of the atker ( i run 12% atk speed on darius and her w decreased my 0.78 atk speed down to 0.36, this is ridiculous) as if that wasn't enough this ability is what makes fiora uncounterable as she is just as potent in any matchup. Blocking riven knockups, jax stuns, darius ults, irelia stuns, nasus Qs, and the list goes on. I'm afraid you have to choose riot, make it so it either blocks the damage from an ability like let's say a Nasus Q or Darius R, OR just the CC ( riven's CC jax E etc), not both. What do you think ?