User blog comment:U N Ovvrn/Kha'Zix rebalance/@comment-13372515-20140705201137

But his problem of having only 2 damaging spells is still there. I've had this idea to fix it at least somewhat: make evolved spells adapt to other evolutions he spent points on.

For example, evolve both Q and W. Now his Q heals him for one-third (didn't think much about the values) of what W would, W benefits from isolation (probably with reduced effect). Evolve Q and R, Q now procs his passive with hitting power and slow also reduced 3 times (this works even when he doesen't have the Unseen Threat, but will remove the stack if he does), R damages enemies when he passes through them dealing half the damage a Q would (reduced benefits from isolation but this "pass-thru Q" doesen't proc his passive) and so on.

Possibly a nerf to his early game would be needed to counter these late-oriented changes but anyway here's my idea.