Interestingly, RDM actually holds a higher absolute maximum parse on Voidwalker Savage on FF logs than MCH or BRD. It is very close behind summoner in absolute maximum potential.
In addition, the statistical maximum is slightly higher then both MCH and BRD and is much much higher than the upper quartile value for the job.
This indicates to me that a large majority of RDM players play below the maximum potential of RDM. I would put this down to the fact that the majority of fights end up with deaths and wipes that result in RDM sacrificing personal DPS to raise. The damage of RDM should be balanced to an ideal situation where no raise is necessary. If they were able to match the damage of other utility jobs
while raising, and also bringing embolden, RDM would be overpowered. This is why RDM always
looks underpowered on logs.
I am not sure RDM needs a buff in this respect. BRD, MCH and RDM all feel disadvantaged right now simply because both NIN and DRG are overtuned. Since the other two melee, SAM and MNK, are both personal-dps classes (and therefore should be doing more damage than utility jobs), 5.08 melee are currently overtuned. The current insanely overpowered state of NIN is very likely to change in 5.1... leaving the major problem-child as DRG.
When NIN comes back down, DRG could use a nerf and MCH could use a buff (given that it has no DPS-based utility). SAM could also use a little extra love to put it on par with BLM and MNK but it is not far behind, numerically.