The thing that irks me about DRKs who complain about their DMG, and assume they should be the highest DD in the game is that its a hybrid job. Its not a pure caster or physical attacker.
It never was a pure anything.
It is more or less, a more physical sided RDM, just with different named spells/effects/weapon choices. Granted RDM excels in its role outside abyssea, and DRK has been lackluster for a few years.
But, my point is DRKs need to focus less on DMG and assume a more hybrid role.
I would love to see Absorb 2 spells from Lv.90-99. Very potent, effective Absorb spells that last longer, land 90% of the time, grant greater benefits to the DRK and hinder the mob more.
I think the only reason the FFXI DRK community took the melee route is because Abs-spells were so damn useless to start with. (well, that and because SE gave them access to all the gear WAR had access to such as ebody/ridill/hecatomb as well as the weapons)

When I see DRKs complaining about DMG, its like seeing RDMs complain about how their Nukes aren't as powerful as a BLM's.