User blog comment:Berryeater/League of Rework, Part 2, attributes/@comment-25228021-20160525200901/@comment-5256197-20160527090205

400 hp is a lot, it's one ability. That Vayne has much safer time knowing that a lot of dudes who would normally oneshot her in one spell rotation now can't. You would reduce alot of the overall counterplay against AD carries by giving them a huge chance to come back from their mistakes.