Currently, the encounter is trivial according to just about everyone that has tested it. The 10-man version is a breeze, and the 25-man version can be done with 10 people. I think it's safe to say this encounter isn't complete yet, or at least it needs some major retuning. I'm not sure how I feel about what loot this encounter drops. If it's intended, it seems like a rather trivial way to award those things. Season 5 armor from a raid boss? I know around Patch 2.4 they put in the ability to trade armor tokens from dungeons for old season gear, but this boss is essentially awarding the cutting edge arena gear for a 10 minute jaunt into a dungeon. Granted, your faction needs to have control of Wintergrasp, but the point remains. It's really, really easy to get gear that should take a little effort to get. There's still the RNG to deal with, but I still think this boss should have a wholly different loot table.