Correct, its just normal DT unfortunately
Man, that sure would be nice if they changed it to DT- II to give it Bravura more of a purpose. Similarly, would be nice if Kikoku AM gave Subtle Blow II instead of easily capped SB1.
My unrelated question:
For the Dathba line of Besieged weapons, do any of the special Besieged only stats (for example, the crit hit dmg +50% on dagger) apply to your mainhand if the Dathba weapon is offhanded?
I assume the OAT only applies to the weapon itself (and not your weapon in the other hand), and also assume that all of the Dathba weapon stats work on itself if it's in the offhand - but I guess confirmation of that would also be good.