Cauterize takes a hit that would kill you and makes it not kill you. If you're too dumb to get out of the fire after your magical powers keep it from killing you the first time, then yes you will die.
Also: Maybe you weren't in the beta to test the Cataclysm raid bosses, but other people were, and many of them have written about their experiences. If you haven't done any testing, and you haven't done any reading, why are you posting?
Also also: Don't use ellipses instead of proper punctuation.
Originally Posted by Vontre
Oh, and I wouldn't run without Cauterize on anything except farm content. A talent that allows you to fuck up in the hugest way possible and get away with it every minute is just ridiculously good. Not like you would skip anything crucial to get it.
When the talent changes hit Live servers I thought the same way about Cauterize... it seemed like a no-brainer.
But in practice what I found was that is is ineffective for the mechanics that killed the most - Infest, Valk drops, runaway Defile, Unbound Plague, even Bone Spike or Blood Beast / LDW melee swings. Since Cauterize doesn't clear your debuffs or threat, you simply just take another lethal tick of the dot or another 1-shot melee hit.
I found it to only be situationally useful for a limited number of things... most notable cheesing Pungent Blight. But even there I was already used to ignoring all spores and /cast Ice Block followed by /cancelaura Ice Block after the cast completes. Cauterize saves maybe a GCD or two at most there.
I haven't had the good fortune of playing in beta, so are there really opportunities for Cauterize to shine now? I was very disappointed with the ability in ICC, but would love to give it another chance if there is good reason to.