User blog comment:Makbloo/Patch 3.7 thoughts/@comment-6313572-20130515230611/@comment-7434112-20130517080918

Duuuuuuuude.... if you do wolves>smiteless blue>red you can do a gank at level 3.....

If you don't "spam" his abilities, you are not doing as much damage and no sustain (they cost current health and give a fixed amount from the blobs) and the nerf was to his ult, which was mainly used for the knockup rather than damage. His early ganks are amazing, being able to fly from unsuspecting places and the damage is pretty good. After 6 his ganks become even more powerful, with a knockup and  350 damage from the ult alone (if he keeps close).

If you really think that ZAC's HP regen was was his main form of sustain, you are pretty wrong ._.