The only card I question is Loot Hoarder.
This is just my opinion of course, but between 2x Commanding Shout, Battle Rage and Novice Engineer, the draw power is already really strong. I dont exactly know what to replace it with. Maybe something along these lines:
-2 Loot Hoarder
-1 Murloc Tidehunter
+2 Harvest Golem (really combos well with Frothing and Knife Juggler, and really strong against Priest, Mage and Hunter)
+1 Cruel Taskmaster or Raging Worgen
Personally I lean a little more towards Taskmaster. Imagine for a moment: its turn 7, you play Warsong Commander, then Amani Berserker and then Cruel Taskmaster. Youve now got a 7/2 Amani Berserker with charge. Granted, thats a very specific situation. But it gives us another potential win condition. The Taskmaster also gets rid of Divine Shield.
I dont have much experience with the deck, but hopefully that gives us something to think about.
Edit: With weapons becoming so popular, a second Ooze might not be terrible either.