I've personally played a decent share of Deathrattle Demon Hunter throughout Standard and Duels, and let me tell you: the deck is fun in both formats. Highly recommended, especially if you manage to hit some great Passive Treasures like Rocket Backpacks or Totem of the Dead.

Passive Treasures chosen by the player during the 12 wins run

First Pool - Potion of Sparking

Second Pool - Totem of the Dead