I just wish it had some actual rewards to it. Yeah it has soul ash, but I have my legendary now and it's my BiS and I don't raid anyway. I don't even feel the need to upgrade it.
Random mount drops would be nice and on top of that the ability to level the characters through Torghast would probably make me run this a lot.
As it stands right now I have no reason and no desire to go back in there. Which is a shame cause beyond your weekly renown there isn't anything to do.
Another failed feature like Warfronts. At least island expeditions could give you mounts and experience.