Kinda sad that DRG get such a rap. I know for a fact they are excellent dmg output, even now. And even against mobs that con even slightly lower than the norm, HNM, NM or what have you, they become enormously amplified in damage dealing. And of course, the hate shedding ability is invaluable in the case you draw an immense chunk of hate. Kinda like how SMN are overlooked as competent DD, but its because no one looks at the alternate purpose of letting an avatar attack, that is, drawing hate and tanking for a brief moment.
If nothing else I've learned a well placed blood pact can save an HNM fight or not, or save a battle, like against Fenrir. I can't count the number of times we were gearing up for the 2 hour and I would then try to force it out with a spinning dive. Sure enough at about 50% HP, the pact would draw aggro to leviathan, I'd see "Fenrir readies Howling Moon.", and I've grown accustomed to the "oh shit! RELEASE!!!" reflex, which completely nullifies the 2 hour move.
A DRG could also pull this off, by pulling hate on him before the 2 hour and then super jumping once he uses it. Bam, no target, no 2 hour. If you think about it, many jobs are considered gimped in one way or another because people do not take the time to learn every intricacy of the job and exploit those nuances to their fullest, like the above examples. Not every job is going for high numbers in damage, and that includes melees. Monks get rapped on because they do damage over time, instead of bulk damage, so they "seem" to be doing less when in fact they're often outdamaging most any other melee just with normal attacks. Dragoon get rapped on because the mainstream levelling path only caters to the same old Distortion mindset... a path of levelling designed for the THF, NIN, RNG, and mage line onry. There's a lot more out there than crabs, and most of these routes are MUCH better. SAM get rapped on cause they don't do major damage, but that isn't the intention of their job. They're complete monsters at TP gain and linking into skillchains. In fact, name one other job that can perform a part in ANY skillchain out there. And I do mean ANY.
So basically, if you are a melee and are not THF or RNG, the popularity contest is against you, because you don't put out 800 dmg sidewinders, or gil toss your way to the top (again, the RNG job in a nutshell), or have an incredibly overpowered WS for use every minute (if you think about it THF dmg output is only mediocre, but again, people look for big numbers, not damage over time.)... even an extremely well equipped THF cannot put out the damage over time factor, but are more a support melee job until that minute timer passes once more. Same goes for DRKs, people seem to not notice the horrible accuracy issues they have, but throwing a powerful guillotine (once more, big numbers) every now and then is enough to set people into the idea that DRK are ultimately powerful. They are, but unless they have top of the line equipment, prepare for a whiff fest.