@Riot: Thank you for nerfing Rengar's Bonetooth Necklace's scaling!
That was the majority, if not the entirety, of the balance problem with him and pretty much the sole thing that allowed bruiser/tanky builds to exist.
With the bonus AD granted that easily, he could build tankier. With the tankier build, his W became more effective. With the tankier build, he still had massive damage.
Without the massive bonus AD granted, now, he cannot build as tankier. Which means his W also becomes a lot more critical in timing. "Should I use it for the CC removal? Should I wait and use it for the heal last-second for maximum effectiveness? Should I use Empowered W to prevent CC?" Instead of almost what was a pseudo-tank Ekko ult sort of thing. Now, if he wants damage, he will have to build a lot more damage. AKA, it will be a lot easier to actually kill/punish him with good teamwork.