So you enjoy having a jungler that is completely reliant on your lanes winning rather than being able to actively push the game over.
Kha'zix is just a kill moar champion. Any kill you get with him before 20 minutes is a kill you would have had with another jungler, you just get it faster. He's in an OK spot as long as the players you're playing against are actually idiots and they allow you to catch them isolated.
He needs consistency. There is no reason why he should be so reliant on one mechanic that gets cancelled by any minion, champion, or tower near the enemy. If they actually are caught out, it's their own fault for not knowing how to play against Kha'zix.
Sure, you can play smart with Kha'zix and make flanks and such to put yourself in a better position to make catches, but no champion should be totally reliant on the enemy's misplays to win a fight.