I agree. Save TP, a bit more native attack, and better "superweapons" along with improvements to the WSes of these weapons, and DRG would be a lot closer to good than it is now.
While I'm at it, I might repeat an earlier idea that was mentioned somewhere. How about a trait for DRG that was stronger the stronger your opponent was? The more levels above you the target was, the higher your attack against it would be (or lower defense for the target), as well as ignoring a certain amount (also increasing with enemy level) of damage resistance if the target has any.
This strengthens DRG against the targets where it is currently considered weak (high level NMs) while it does not make it stronger where it is currently considered strong (killing things that are close to the DRGs own level, or below).
This could either be a constantly active trait, or it could be a JA with timers similar to berserk. If it was made a JA, there could even be a drawback associated with it. Perhaps it would also make the DRG get a +DT% amount based on how many levels above him the target was. In either case, it would be like a berserk-lite, in that it would have close to the same damage boost, but only work on high level enemies.