Well you see the Khyber response has never been toward melee that take care of themselves unfortunately but instead to throw more barbarians and clerics at a problem like this. More hit points and more heals.
It is too bad that paladins do poor dps otherwise they might have a good time this mod because their defense as a defender of siberysis is pretty solid with 800+ hp, great saves, self healing and buffing. They sound great but their dps is just so shoddy.
My guess is more ranger discrimination because of their hp issues unless of course there is advantages to being a ranged character in the new raids. Rangers do have more sustained dps then barbarians, but it is almost never that they get the opportunity to show that strength.
My little knowledge of the new raids notwithstanding but ac tanks or super amp builds are really good in Tower Elite currently so that is something to keep in mind. Anyway looking forward to next mod like so many other folks should be fun.