Life steal changes
Lifesteal should be 33% as effective on minions and monsters. I feel like the moment someone gets a single lifesteal item early in lane they become that much harder to push out of lane. (vayne and fiora are notable characters of this) it makes them hard to lane against without similarly effective sustain mechanic.
And got knows how many times spell vamp was nerfed because of "reasons". There is only one spellvamp item left in the game. (Wota no longer gives it. But it provides a similar effect. it just isn't additive to pre-existing spellvamp)