4.18, Kha and Yasuo, @Pwyff
Kha'zix and to a lesser extent Yasuo are mains of mine and I have very strong feelings on Kha's change and felt it worth commenting on Yasuo's as well.
What all of this tells us is one of two things: a.) The utility and strength of evolved W is too reliable in combination with Kha'Zix's base kit, so he can get the best of all worlds by maximizing his utility while also being a high-threat assassin. Or b.) Kha'Zix's evolved Q is too weak to properly use as a primary play pattern, so he's forced to max / evolve W to stay relevant in the game but doesn't really want to. We strongly suspect the first case is more true (and this is reflected in our change).
Players are maxing and evolving Kha's W first because after the loss of the evolved Q execute damage, he needs his W to stay relevant pre-11. In 4.9 when his Q got a hard nerf and his W got a utility buff is it really so surprising that players adapted to that style? Additionally in 4.9 with the removal of his damage reduction while stealthed, there became little reason to evolve R; the additional stealth is nice but his primary engagement/disengagement tool is his E, in most cases his R is used for jukes and buying time for his significantly more effective repositioning skill to come off cooldown. I do not deny his W is very strong but it's much less the "best of both worlds" proposed above and much more of him needing it early because of the significantly reduced damage and the lack of an actual assassination/execute on his evolved Q.
As for Yasuo, I fully agree he is an incredibly powerful character and does need some balancing, but after losing the bonus flow generated by E I feel it it out of theme with his character and while it does not appear "that bad" I feel reducing his speed has a high level of punishment for a character that is designed to be mobile on top of his heavy base health reduction, reducing his base health by nearly 10% and lowering his move speed which is primary defense early game seems ever so slightly TOO harsh.
