well you were wrong in a least one aspect. Ret pallies are perfectly viable raiders now that there is better threat reduction on their powerful burst damage. I'm not so sure about MS though, but I'm pretty sure, from what I've seen, it's a BS raid spec, and again only speaking from experience, not too many guilds who are in BT and hyjal will bring along a full arms warrior (I could be wrong though)

But just for the record, much like everyone else says, the stats on this weapon would indicate it's best suited for hunters first and foremost. No warrior should waste DKP on this for their 2H weapon anyway, seeing as how Torch of the Damned from the Essence of Souls is balls out crazy