Excuse me
But all of these are perfectly viable
Jarvan is strong as fuck in top lane, Veigar is perfectly fine as well :^), Quinn is a monster toplaner instead of adc, Zac is a megatank that simply doesn't have much damage, is all.
Darius, Nasus, Cho'Gath, Jax, Fiora, Trundle, Wukong, Ryze, Kayle, Olaf, Volibear, Lulu, Pantheon and Singed are all mana based top laners who work perfectly fine there.
There's barely any balance issues. Khazix his nerfs won't be destroying him. You know why? Because every champion is viable, and someone will find a way to make them broken, especially considering Khazix his kit is fluid as hell. He has a gap closer, a slow and stealth. That's enough to make something work.
May I remind you that after Rengar's last nerf, everyone said "OMG RENGAR IS USELESS NOW"
Then Ryan Choi came along to hold hands with people who only think in theory instead of practice to show that rengar is still actually broken as fuck
Only to have Rengar nerfed again
Khazix isn't fucked. He's still just cancerbug, and he shall carry just as easily, except without a bad player crutch that gives him 60% damage reduction while stealthed
Th