I agree that DRG needs more fun mechanics, it's kinda boring to have a job just...jumping.
But DRG is not behind, when it comes to DPS. All DPS classes are fairly equal. when i parse, my DRG/BRD/BLM all do pretty much same DPS, and they have relics/DL. MNK has garuda claws, and does slightly lower DPS.
If you, or other DRG do lower damage, it's cause they dont have good skill rotation; that is all. Equally geared/skilled ppl, always do about same DPS. BLM has higher max damage than BRD, but cast much slower, so it's same DPS anyways. And it's no different with DRG. DRG does higher damage than MNK, but MNK use skills faster, so it's about same DPS.