I am a 
main and I think a reasonable nerf to him would be to nerf his E damage:
80/130/180/230/280 -> 80/130/170/215/260
And maybe lower the ap scaling from 60 to 55?
I don't think he is that op right now, but I think this is a reasonable start.
Jbels1 votesHitting the scaling doesn't really matter considering most Zacs are going Cinderhulk over Runic Echoes
fuffychan1 votesHow about we cut his E range in half and start from there
flyingbaklava1 votesAs a Zac main, this rework put Zac in a really terrible spot for balance as they gave Zac unbelievably potent CC for coordinated teams (hence Zac being perma banned in professional play). Reducing his damage any more (and they reduced it a ton when they reworked his ultimate) would risk making Zac 100% reliant on his team for impact. As it is, it really feels like Zac is only strong if he has a fed team to follow up on his CC.
I think a smarter move would be to revert his ultimate. It would weaken his most potent form of CC while also bringing back some of his dueling potential and damage. It would make Zac less potent in team play, while giving him some capability to influence fights by his damage instead of his CC.
