I'm guessing this is the deck you're talking about? http://deckbox.org/sets/303030
It looks potentially promising, but four things pop out at me off the top of my head.
1) You have almost no removal, meaning that just about anything can get in the way. Sure, you smack them a bit here or there, but at the end of the day, a single Vampire Nighthawk stops you dead in your tracks until you hit a Hellrider/Boros Charm/Zealous Conscripts. It could work, but after play-testing a crazy R/W aggro build a friend put together, you might have to be faster than this, or at least have other ways to get around blockers.
2) Blind Obedience is a very real obstacle that would completely defeat the purpose of this deck.
3) Supreme Verdict can only be addressed by Boros Charm and given the aggressive nature of the deck, you're unlikely to be leaving the mana open to cast it. This was another lesson from the playtesting I mentioned above. We found that almost every turn he was playing creatures to swing in for more damage and seldom ever had anything open to cast the charm. If you slow down to keep that mana open, well, you've just defeated the purpose of your own deck. As such, you'll have to be REALLY careful not to over-extend yourself which, in many regards, is what you're aiming to do here.
4) Card draw? Let's assume for a moment that the game makes it to turn 5-6 and you're top-decking. Does drawing a Shred-Freak really help that much? One of the biggest issues with these sorts of decks is that they don't provide any added card drawing and, as a result, if someone lasts longer than your hand is full of cards, you're likely to lose the game.
Anyway, it seems neat enough and playtesting will ultimately decide whether or not to run with it. But I would consider less emphasis on haste and more on some of the combos available to Boros builds (i.e. Cloudshifting Aurelia with a Hellrider and Frontline Medic to be able to attack into their defenses three times and set off three waves of Hellrider triggers).