Tying ability damage to weapon DPS was the worst mistake they made, in my opinion. Not only did it make zero sense but also made all character classes feel the same in terms of itemization.
You do realize, and I don't know if this is still true, but at one time the barbarians were, by far, the dominant class in D3? They do ungodly amounts of damage and they're super Tanky. There's an 8 second Azmodan kill on Inferno by a Barb.
Just saying, the barbs were actually imbalanced horribly.