Face Hunter is among the strongest decks at the moment, maybe even the strongest deck, although it does have counters (like Control Warrior). It's not just game length that makes it a good ladder choice.
I would certainly run 2x Eaglehorn in any version of the deck though, as it's the best card in the deck: at least 6 damage from one card, threatening 9+ with a trap, which can be split up to bash down small taunts, and all that for only 3 mana. It's certainly better than Reckless Rocketeer, which only represents 5 damage if it gets removed before attacking again, and costs a whopping 6 mana.
Example cuts I've seen are dropping 1 Animal Companion (as it's merely OK if you don't roll Huffer) or dropping 1 Infiltrator.
Cool, I swapped the Eaglehorn back in minusing the Reckless. Your math convinced me. I tried dropping an Infiltrator for a Snake Trap too, so that Mad Scientist has something to draw if Explosive is already out and to increase the chances of 9 damage Eaglehorn. I like the Animal Companions too much to cut one.
So I gave this a shot, as I like fast decks, and I had mixed results.
I'm running two Eaglehorns, Leeroy, and I swapped in Mukla for one of the UTHs. My favorite win was getting Paladin down to maybe 8 life after he had mustered, then he dropped quartermaster. Instead of going face, I traded something into the QM to get it down to 2 life and played Explosive Trap. Then I just didn't drop any minions, going hero power only.
He knew, so he didn't attack and kept building his board instead. But he dropped all small life minions, and I was way ahead on life, so I just kept shooting him. Eventually he had a full board with Sludge Belcher and a bunch of other stuff, so I dropped Arcane Golem and UTH and won.
Mukla is as unimpressive as you'd imagine, and he's not useful if you don't draw him in your opening hand. I'll swap him back out, I think. Mad Scientist hasn't played at all for me yet. It is fun though. And knowing you've basically lost if it's T8 and you don't have insane pressure on your opponent is nice, since you can resign and move on.