He was terribly nerfed though after season 3
Base : Major nerfs on health rejen / Blobs changes alot (mechanics etc..) Base range increased from 125 to 175, Base MS increase to 340
W : Cd increased
E : Dmgs nerfs x2, Range nerf, knockback duration increased
R : Tenacity bonus removed, Dmgs nerfed
The only nerfs that wouldnt destroy the champion (since his core ability is e and it only has been destroyed since zac release (he was OP back then we know)) would be on his base MS and attack range.
But then again, he is very vlnerable to masteries picked... once they change in s7 it could be totally different (he could need buffs)