It doesn't matter much to me if they change AMZ. As long as it's on the same line as Purgatory, I'll probably never take it as a tank in heroic raids.
It saved me countless number of times, and you also get the benefit of not losing durability while dying if it didn't proc earlier.
Also, I'm kinda sad they think our raid utility is enough. Death grip isn't worth that much, heck, I often use it a second taunt in raids. Blood worms are random, and everyone and their grandmas can rez in battle nowadays, so yeah.
Unless they make AMZ baseline, or change it completely (i.e. not static and small anymore, or not only reducing magic damage), I still probably won't ever use it. Which is sad.