Kayn vs. Kha'zix
Kayn's ability to change mid game to adapt to the enemy team is what 
evolutions should have been imo...
1 Comments
You know, I haven't played a lot of Kha, but when I do (a couple of ARAMs recently), I was pleased with his evolutions. They make you think about what the game looks like and what your win condition is.
They aren't always perfect, and Kayne won't be either. I would bet money that one form or the other is going to be MUCH more popular and they'll need to adjust, just like Kha has been in the past. This is just how it works with all the options.