Kha'Zix, the Voidbug that gets stronger by eating stronger things

If Kha'Zix was allowed to keep eating things and evolving past his four evolution points... what would happen with his evolution? What would he look like? Would he outright develop new organs/limbs to accommodate further evolution? I'm no scientist, but I did a bunch of research and found that... yes, technically, he could do just that and more.

The first thing that he would probably evolve is his own sight. Insect eyes are really good at detecting movement and reacting to it. Kha's reaction time would be better than a fighter pilot... and then some. It doesn't end here, his antenna could actually detect infrared light!

http://www.scholarpedia.org/article/Insect_motion_vision http://listverse.com/2013/04/18/10-surprisingly-brutal-facts-about-dragonflies/ http://archive.larouchepac.com/node/17203

Great, now you can't even hide from the bug. At least you have range, right? Well, Kha kind of already developed his spikes (inspiration from these little guys no doubt) on his shoulders. But hey, he could always throw acid at you.

Bah, I'll just squish the bug! That'll do the trick! - you, probably

Well assuming he isn't flying around with further evolved wings, squishing him might prove difficult. Hell, at the size he's standing at, he might even be bulletproof.

These are just some of the things I've googled. Of course, this is a fantasy game and Kha'Zix is a creature from the Void, not an every-day insect of our world. But if he kept evolving past what the game mechanic allows... who knows what would happen! Kha is just so damn cool.

(Oh, and he could hold his breath for a really long time...)

Nature sure is a mystery.