A few points.
First off, maybe I'm odd, and I know it's a bit slow, but I always feel like Door of Destinies does a good bit of work in slower tribal decks like this. The real benefit being that they need artifact removal to deal with that set of pumps.
Second, Whip of Erebos might slide in here quite well, as it provides the option of coming back in late games where you've been outpaced. All those huge minotaurs with lifelink sounds awfully appealing.
Third, don't stress the lack of a one-drop minotaur. Keep in mind that they're almost all sitting with 3-toughness, making them able to exchange quite favorably in combat. You're going to be trading two-for-one against most of their things unless you're facing down larger threats from a mid-range deck.
Fourth, I'm thinking this isn't fast enough to go full-bore aggro. You'd be better suited to toss in some better removal options. For instance, Felhide Brawler really doesn't get the job done. You could just as easily drop them for Drown in Sorrow or Bile Blight. Additionally, I get that you're trying to emphasize the red side over the black, BUT, you're really losing out on better removal. For instance, Hero's Downfall just beats pretty much all the burn you have in nine out of ten situations - PW removal, a means to deal with a Desecration Demon, etc.
Fifth, Oracle of Bones really doesn't get you anywhere. The opponent is going to see that you're not sitting on any meaningful spells and will just refuse to pay the tribute... making it effectively a four-drop 3/1 (which is not exactly ideal).
Sixth, Searing Blood is hands down better than Shock and potentially even Magma Jet. Presumably the RR cost won't be an issue, and the ability to both burn the opponent while taking out a creature is a big boon. Toss in that you can redirect that damage to a PW, potentially killing both a PW and a creature for 2 mana... yeah... that's a play to get behind.
Lastly, where's Mogis, God of Slaughter? Nothing like a guaranteed removal/two damage a turn... it would work in this shell (at least it might).
On average, I think the tribal strategy is almost there but I can't say I think it's going to be super competitive. You'll catch some folks on bad draws and will squeeze out games here or there, much like the more gimmicky heroic decks out there, but you're likely going to run into a buzz-saw when you face off against one of the modified tier 1 builds.
Best luck!
61 (100%)
(Ragemonger could be good too to reduce your Minotaur costs!)