It really doesn't matter as the game is currently incomplete. It'd like me complaining that BLU sucks under level 60. We haven't reached the cap yet @99 so DRK has plenty of room to evolve. The changes to Walk of Echoes will no doubt make Quietus/Torcleaver easier to obtain and DRK will return to the status it enjoyed when people move out of Abyssea and onto whatever content spans 90-99.
Barring a huge gamechanger, DRK should return to the dogpile of DD after Abyssea somewhere in the middle. It'll never probably approach the level of great WAR but the job was designed as a hybrid and so it'll remain as such. I know alot of DRKs find the magical side as useless since it eats up DD time but its the only way to make DRK different from smashy smash WAR.
tl;dr: DRK will be glad that Abyssea is over so long as the new content doesn't emphasize spamming Atmas or crits. Cata will be useful again for self heals when the era of perma capped MP ends as well.