Initial thoughts:
Grim Patron: Garbage, not actually better than Raging Worgen if you want OTK. Raging Worgen is both better for OTK turns, especially since you don't have to save Whirlwinds for him and try to control aggro without Whirlwind, and he's also better if you for whatever reason decided to throw a 3/3 out there and hope it sticks, since Raging Worgen is cheaper.
Gang Up: Garbage, from my testing Rogue Mill just hurts for Naturalize too badly.
Emperor: Doesn't seem to be garbage. It doesn't seem hard to play a 5/5 and not die and have 6 cards in hand.
Quick Shot: Doesn't proc as much as I imagined it would, but it allows face hunter to be way less dependent on owling through taunts because you have such a huge amount of direct damage available now. Like, Ancient of War might just be a bad card against Facehunter now, Hunter's Mark aside, because by that point your death can be sitting in the face hunter's hand in direct damage.
Arcane Shot x1 seems a lot more attractive now since it can help you get to that critical mass where you can ignore a Sludge Belcher or Tirion instead of silencing it and have a more consistent gameplan that way.