I feel like I miss IBF, the stun break was a valuable tool for tanking and the extra DR cooldown was appreciated when you needed more magic damage reduction. I dislike that Red Thirst is overly manditory now that Vampiric blood has a bigger CD than live. (though, when talented into Red Thirst, I don't often feel like it's never there when I need it.)
Death Strike feels like ass, as always, "Heal damage taken in the last 5 seconds" is obfuscated, switching it to 10% plus X% of missing health ala the paladin self-heal would give the same overall effect with the added benefit of not needing a fucking addon or weakaura to give you an idea if it's worth hitting or worth waiting for.
Overall, I don't think we're far enough behind the other tanks to really warrant massive buffs, but there's defo some QOL changes to make it all more managable and to make some talents a bit more desirable (or even viable in the first place).
(for reference sake, I play blood ultra-casually).