So I just read this about Kha' Zix on the recent Surrender at 20 article.
> When asked on reddit about the team's thoughts on Kha'Zix, RiotJag noted they'd tentatively be taking another look at Kha'Zix evolutions: > > "Quote: > Sorry if here isn't the best place to ask this, but I'm simply curious, you have any plans for Kha'zix at the moment? I don't believe he's weak, because if even at the end of the game he is one of the champions that deals least damage overall, he still has a great 1v1. My problem is that he lacks reasons to picked over other AD junglers. Also his clears aren't the best comparing to the other junglers as well, and adding the stuff I said above he gets very punished and stays way too behind in game due that when countered on jungle. Are you considering something to him like more heal on W when using it at jungle camps or a better upgrade option to his R? > I don't want him to return to the state he was before being changed, but at least give him reasons to be picked. Actually, many champions aren't picked on competitive not due their power, but due not having reasons to do so. Any champion should have something they excel on. > > There's a chance we're going to dig back into his evolutions over the next few weeks and see if there's some value we can add there. It's really hard to work on Kha'zix because the work always ends up getting really involved, so can't promise anything there." > >
http://cdn.papermag.com/uploaded_images/shia.jpg
My suggestion would be granting vision of isolated enemies in a vision radius of around 3.000 when Evolved Active Camouflage is cast. This would fit him more as an assassin, unlike damage reduction in previous iterations.
The implementation of a charge system for his R, like this post http://boards.na.leagueoflegends.com/en/c/gameplay-balance/yBOFTuRx-what-if-evolving-khazixs-ultimate-turned-it-into-a-charge-system suggests, would be nice too.
He doesn't deserve a big buff though, as despite of his win rate and situation this season, the only things keeping him back are the uselessness of the Warrior enchantment late game and a meaningful reason to evolve his R.