Vayne buffs contradict her intended niche

In patch 5.22 Vayne's base damage on her bolts were reduced and her percentage on her passive increased. This was done to help solidify her role as a tank buster/single target duelist. "Vayne's always been one of the few markspeople that could forego the all-powerful Infinity Edge in favor of hammering in more attacks to Silver Bolt her prey to death."

But with the heavy Bork nerfs, it's just not an efficient item on Vayne; with her recent buffs to her critical strike reliability and damage to her tumble, she can three shot carries with just an IE and a shiv.

I thought her specialty was using careful positioning and kiting to take down beefy tanks engaging but now Vayne players like to take the role of an assassin and then proceed to clean up the rest of the enemies with the damage threats gone. She can do this even when put behind. It's not fun to play against and a bit overturned.