Unfortunately, I fear this card will suffer the same fate as Oblivitron. DR Hunter and Rogue are just obsolete when regular Tempo Rogue and especially Aggro Mech Hunter are way easier to afford and play. Nevertheless, it's an interesting addition.
Not enough support in Standard as of right now. But if there is support, this card becomes very interesting and powerful.
I believe there are some Death rattles, that would be great in Standard to only cost 1 mana, but since you probably want at least 3 to 4 cards to get hit by this effect, I am not sure this is good enough just yet.
But the OTK factor is alive and well. Empty your deck, get yourself a 1 mana Mech'thun and potentially win. Chef Nomi is your main win condition, followed by this as a backup?
There were successfull decks, which played 5 or more cards to discount their Mecha'thun and just played the neutral draw engines (auctioneer, acolyte,...). That worked really good.
Now rogue only needs one additional card for the discount and has tons of draw and cycle mechanics.
There are a lot of other new cards, but right at the moment I think Mecha'thun rogue will be one of the new meta decks. I dont think even a bomb warrior can shuffle as fast as a rogue can cycle his deck.
Good enough Rogue is capable of generating deathrattle minions so easily but I am not sure why they are pushing for deathrattle for Rogue seriously there is always some card related to deathrattle in every expansion for rogue.