Remove Carve and Spit, reduce Abyssal Drain cooldown to 30s, boost damage potency with reduced damage after first target to compensate. Replace Enhanced Unmend with Enhanced Abyssal Drain boosting it's cure potency from 200 to 400. All in all that would still be just a fraction of healing WAR gets with just Bloodwhetting, but between TBN and rotating cooldowns properly it should be enough to have that extra oomph to bring you back from the brink.

Also just remove the dying part from Living Dead, making it a slightly better Holmgang but with longer CD should be fine, and we can actually use it as an "oh shit" button in dungeon pulls without dying except for those rare scenarios when you get paired with WHM who saved benediction just for that.

Done, no need for a complete redesign.