I know a lot of PLDs think they got ignored for a long time, but DRK has been entirely ignored since a few weeks after release, even suffering a notorious mess up on SE's part that broke our Dark Arts for a bit. Meanwhile PLD kept getting small buffs all throughout HW.
Both jobs needed to be buffed to WAR's level, and honestly we would've seen a much better PLD iteration if DRK had received some attention due to the fact that PLD would have been so bad that it would've forced them to address it properly. Fact is, DRK and PLD were pretty close all throughout 3.x, but they both had niches and the meta and raid design only fit DRK's.
WAR wasn't even overpowered. It was a perfectly crafted job that played amazingly well. I really wanted both PLD and DRK to be buffed to its level, but somehow DRK just got completely ignored. Now we're in 4.x, and there's still people wanting to say DRK is "fine" when it isn't. Granted, there's always going to be people saying that about every job in need of fixing, WHM/SMN/MCH all being cases we've seen.
I've about lost hope that we'll see serious addressing of DRK until it is so under-powered that it's trash. PLD isn't OP right now, just as WAR wasn't OP in HW. PLD still actually could use some tweaking, like a reduced HG CD (even if it reduces the duration) and some enmity on Total Eclipse.
DRK is simply under-powered right now and there's too many people blinded by TBN to notice it. If not enough people notice how inferior it is, SE is happy to leave things the way they are.
I suggest doing what I did and switching mains. SE won't connect the dots of people unsubbing to a specific job in need of changes. They will however notice that fewer and fewer people are playing it while playing another job.
Basically, if you increase the number of clears on WAR and PLD, while simultaneously reducing the number on DRK, they'll notice more.
As Xeno said after noting how few people were playing WAR in v4.0S, he could "taste" the WAR buffs already. This is despite the fact that WAR is effing fantastic in v3.0S and v4.0S. WAR MT/ PLD OT is easily the best comp for these fights (granted things are hard to define in terms of MT/OT for Neo Exdeath, but WAR/PLD is still king for it). A lot of good players know it already, and eventually everyone should.