Get Ready for Tank Kha'Zix
With the upcomming rework to Kha'Zix, you are making his evolved Q have a lower CD on isolated targets, and his evolved R give him that constant stealth to reset his passive. WHICH MEANS you'll want to just stay in the fight longer to get the most out of your damage. Which in turns mean, you'll build Kha'Zix as a tank rather than an assassin. I may not be right, but I think I am.
At any rate, why did we even choose Kha'Zix for a rework? He's pretty much the poster child for a healthy assassin. He's viable but can be shut down, no one ever builds him as a tank, and can only 1 shot when very far ahead, otherwise he has to play clean up duty. Admittedly his R evolution is pretty lack luster, but his Q seems fine.