They already did that with Furies on their Myth. Wrath's Blessing is a nice buff, but it doesn't really address class balance much. We certainly don't keep a Fury in our raid because of it. We keep the Fury because she is just that @(*% good.
I'd love to have a second Fury that good, and in fact we've been seeking a "Leather Healer" for quite some time now, with absolutely no responses at all. Sad.