Honest opinion: Too little, too late, no matter how good the change is. Nothing would be satisfying minus a full reset.
It's easy to bleat about "hindsight being 20/20" but the fact is that this wasn't "hindsight" this was well, well foreseen both by the current blood DK abusers (some who even posted saying that is what will happen) and oh... the entire "good" (read: non-shitty) arena playing community.
The fact of the matter is my investment in PvP is really little, I'm primarily a raider. But if I were a "mainly PvP" or "only PvP" player, I'd probably have perma-quit over this already.