With the Assassin changes out, the Kha'Zix change I'd love to see!

The biggest problem I feel faces Kha'Zix right now is that he is an assassin that can't reliably assassinate anyone. All of his damage is locked into his isolation mechanic, so if he is playing against relatively competent opponents they can clump up together, near minions, or under towers. The obvious problem in this is that Kha'zix can never get an assassination without his enemies playing poorly or scattering whenever he shows up.

Straight to the point, my suggestions for Kha'zix would be to make his W apply a nearsight/smokescreen style blind to enemy champions similar to Quinn/Graves. Then, when champions are "blinded" by Kha'zix, Graves, or Quinn, they are considered isolated if they can't see any friendly champions. The blind should last a super short amount of time (like .75 seconds) when its not evolved, but the evolved version should last longer (1.5 seconds) and hit 3 people (with the 3 missiles). With that I would also recommend removing the slow on W but making his passive slow stronger, with a possibility that his passive slow becomes even stronger when he's "fully evolved" or when he evolves his ultimate.

He could also apply the nearsight blind to jungle camps/minions similar to the way Quinn does, letting him avoid damage by cancelling their attacks.

I feel like this will give Kha'zix the self-reliability he needs to be an assassin in today's cold unforgiving world. He'll be able to jump onto someone at the edge of a fight, blind em, taste their fear, and then hop away.

TL;DR Give kha'zix a "nearsight" blind on his W

Another suggestion that's been around since the dawn of time: let his Q do damage based on how far away a target is from their ally (30% isolated, 50% isolated, etx). This will stop his damage from being a binary yes/no mechanic, but could result in a more boring playstyle.

Thoughts?