If the offense regresses at all (and it will) then their rotation, especially their 3 through 5 starters, is going to get exposed. Even their "ace" in Tillman (who will regress) is nothing more than a #4 SP. He's not a whole lot better than Dickey IMO. There is a reason that fangraphs only has them at a 39% chance of winning the division with a 5 game lead.
Could they win it? Sure, but I don't think it's a guarantee. I just don't think they are destined for a "special" season as you say.