Actually, they said in their previous interview about DRK (a few month ago, I will look this up, once I am at home and link it here) that they would not change anything about the job until the next expac. IIRC the reason was that a design/overhaul change would be too great and sudden for the design and balance team.
It saddens me too that DRK (and other jobs) are left unpolished. And while I think that at the end of an expac there should be no issue with balance, I would rather play a fun DRK just like in HW than a "balanced", but boring/annoying one.
They also didn't solve the tank accessories issue either, so we'll see in 5.0 what disaster they are creating next.
edit:
Translated Patch 4.3 info from the game watch,dengeki,famitsu and gamer interviews.