Update: Now that all the cards have been released I made some changes. Not sure about Psyfiend. I think Venomous Scorpid will just be better than Pandaren Importer with all of the Shadow spell synergies. Core pieces are: Flesh Giant + Devouring Plague, Raise Dead, Palm Reading.
We've got a couple of upvotes so far. Once the expansion comes out I can write more if I am able to try the deck out.
And, of course, any feedback is greatly appreciated. Super excited for this expansion!