Captain Flowers on Vayne
https://youtu.be/Lf5fXfX785o?t=2280
Yes, its called balanced vs a toxic item-to-champion interaction which bypasses gameplay mechanics
Azael and Flowers also talked about Vayne earlier in that same game - https://youtu.be/Lf5fXfX785o?t=1586
Because Vayne, who is stated to be a "late game carry" and "late game insurance" is also said to become incredibly strong on a two item powerspike ( 
+ 
)
Not only this but flowers also says that post Vayne ult buffs feel like she is a bugged champion, because she is almost never visible on your screen during her ult because of the ult-Q cooldown interaction.
Combo all of this with 9.3 crit changes and Vayne becauses even more of a monster, given that she can still her her 2 item (late game) powerspike and then add on 
+ 
OR 
for even more damage and survivability.
Revert Vayne ult buffs. She doesnt need them, they are as bad in terms of gameplay design as Nasus Q+ult interaction is. Then get rid of double hit mechanic. This one item passive, regardless of the item it has been on, has only ever served to break the balanced gameplay around champs with 3 hit passives.
