Originally Posted by Snuffaluffagus23
He was designed to be great at taking down isolated targets, which does not mean solo lanes 1v1 at all. Taking down isolated targets means the enemy champ is running through lane or jungle, and you surprise him from a bush, thus allowing you to get a combo off before the enemy champ has the time to react and counter. That was the purpose of killing isolated targets. Different from 1v1.
Before the nerf, Khazix was very overpowered. His early game damage was just ridiculous because he could 100-0 other burst champs before he even hit level 6. This made facing him as a solo lane almost impossible because if he doesn't kill you instantly, he'll burst you till you're so low you have to recall and get no farm, and if you do get an upperhand, then the jungler comes up and you're killed easily.
Assassins are meant to kill people when they're not expecting it. Look at most of the assassins. Can LeBlanc walk up to the enemy ADC without an element of surprise and kill them instantly? Sometimes, but a good ADC can do a bit of damage and escape. The point of the assassin champ is to catch people off guard and kill before they can react. This is what made running through jungle with an enemy Khazix so scary, but being afraid to get CS because of his nuking abilities was ridiculous.
you're comparing Kha'Zix to Leblanc? Leblanc have a high burst and she can burst you from a distance, jump to you and jump right back. Kha'Zix was NEVER overpowered and I'm pretty sure Assassin don't mean to sneak up all the time, an assassin is to get to the high priority targets to take them out and safely retreat.
Besides you're only focusing on strengths here, so he has strength in the laning phase and so he also have weaknesses, squishy, low hp, high mana cost, low mana regen.
Now with the new nerfs even when the target is isolated it is hard to kill them, if you're walking around the enemy's jungle with a Kha'Zix on their team, I suggest you to uninstall