Not bad at all, Bite hits almost as hard as DT, and since none of them benefit from STAB, the only advantage that DT have is the SE against Dragonite and Bite charges faster, so that is no "worse" when it comes to quick attacks, just playing style.
And Outrage is not as good as HP but do SE against Dragonite, so is not bad too. You have a good mon, don't worry.