I don't understand why people think <50% WR + <10% PR indicates that a champion is inherently in need of a dire nerf. It just means they're thriving in the current state of the game. It has nothing to do with the champions kit being unhealthy.
At this point adding win rate and pick rates as some kind of data or statistic model in a post is just fluff.
Toxic kits that still exist are champions like Pantheon and Fiddlesticks where there is no inherent weakness to their targetted CC abilities. Abilities that cannot be countered outside the scope of the receiving player's champion kit.
The only 'unhealthy' part of Lucian's gameplay is the fact that he is more or less the ONLY marksman that can proc Press the Attack effectively. That's the only thing that's making him strong right now. If you were to remove keystones from the game, theorhetically, he would be just as weak as he was before the marksman item update, as we would not have any upfront burst damage followed by enhances persistent damage because of the 12% damage received buff.
IF I WERE TO BALANCE LUCIAN AND THE REST OF THE MARKSMEN BUT I CAN'T BECAUSE I'M JUST A PLAYER AND NOT RIOT EMPLOYEE
I would nerf PTA to 9% damage received from 12%
Revert the nerfs on Fleet Footwork.
Because right now the only way marksmen are stay relevant is if they can keep up with Lucian and playing his game by also taking PTA. If you nerf PTA you nerf everyone in the marksmen roster but Lucian will stay on top just because among them he can reliably proc it in all stages of the game, where most of them won't be able to proc it until 12+ mins reliably.
Besides it's not like MOST PTA users are gonna miss that 3%. Melee champs are comfortable taking Conqueror anyways.