Evolving Kha'Zix's Void Assult Should Make Him More Durable
I think it would help out Kha'Zix a lot during late game teamfights if his evolved R (Void Assult) gave him bonus armor/health/magic resist. This could help him get to an enemy's back-line more easily, as well as make it safer to get right up in a carry's face during a fight.