User blog comment:RoznosicielCiast/Problems with new map and new champion/@comment-9713132-20130317063631

Howling Abyss was not meant to be a complete revamp of ARAM / Proving Grounds nor its playstyle - it was just a visual upgrade to help people acclimate better (the biggest problem with Proving Grounds was that massive black void underneath the bridge that made it quite a desolate place).

Also, when you talk about damage on Zac, I immediately regard you to the fact that Zac is a tank. His kit calls for more durability instead of damage. The amount of disruption Zac causes is unbelievable. The AP ratios and his overall abilities aren't meant to do damage - they're to scare away enemies with how much disruption you can bring about to a teamfight. He's not there to kill anyone specifically.