Kha'Zix's Isolation (And why it needs to be buffed)

I'm really pretty aggravated that there hasn't been ANY follow up on Kha'Zix's rework (yes, Rework, it changed his playstyle drastically, for the 3rd time.) because while the rework was successful, I think there's some serious issues with Kha'Zix right now that's keeping him from being viable in the current meta and just making him frustrating and impossible to play as.

So after 4.10 you nerfed Kha'zix by removing his tank stats, fair enough. that's fine, he didn't need them. he's an assassin. But you also nerfed his isolation damage unless he has evolved Q, a bit questionable, but still fine, you want to prioritize assassin damage onto a specific evolution so he doesn't go rampant 1 shotting everything without dedicating his kit to doing so. And finally, you superbuffed his Q so that it blows up everything that's isolated, which was GREAT. It encouraged an isolate and assassinate playstyle, gave him appropriate counterplay, and allowed enemy teams to work around him as well as give Kha'Zix's team opportunities to generate assassination targets through the use of clever teamfighting or Displacement abilities (my favorite is Gragas and blitzcrank.) The serious problem I have with this rework, is that you didn't revert the nerfs from 4.9. What did these nerfs do? They destroyed his isolation pretty heavily. 350---->500 Turrets count as allies.

It's now borderline impossible for Kha'Zix to get onto an isolated enemy, let alone assassinate them in that time frame. anyone who's played kha'zix post 4.10 knows this, his Isolation is utter crap. it's hard to prioritize Isolated champions when they're never available in the first place. Its' frustrating to sit in the back of the fight next to the ADC and just watch your team go down the shitter because you're forcing them to fight 4v5, as your damage is too pitiful and diving into a teamfight would just get you destroyed. He needs a buff, and i know that sounds scary; "BUFF KHA'ZIX? OUTRAGEOUS!" but it needs to happen. His gameplay right now is either you're so far ahead it doesn't matter or you're losing teamfights because it's 4.5v5. I suggest you buff isolation range to an even 400, so it's not as available as pre-patch 4.9 but enough so kha'Zix is actually able to assassinate targets that are isolated instead of waiting for the day that never comes.