Actually from the most recent interview :

"[Speaking about the current very high reliance on tank DPS and stuff]

Yoshida: We'll be making effort to eliminate that as much as possible. Within the content, there are strong and weak points to each job. For example, in the second area of savage, a paladin main tank should have higher stability than a dark knight. Depending on the player and their skill level, each party will see different results, but we'd like to reduce the difference. We can't just make adjustments to jobs based on whether they are strong or weak in particular content as that would break the jobs, so we'll work to eliminate disadvantages to certain jobs as much as possible in the content. That doesn't mean we won't be making any adjustments to jobs in the future, but we'd like to also hear feedback after playing through the different content in patch 3.1."

He clearly says that he wants to alleviate the different weaknesses and strengths of each tank for future content. Whether it needs specific job adjustments or not (I strongly believe that PLD needs adjustments on a lot of things and DRK may need some tweaks too in the physical mitigation and raid utility departments). I think they need to see if changing the encounter design is enough or not, and it will obviously not be enough. I agree that it takes too much time, but I believe that PLD, and tank balance issues will be fixed at some point, most likely 3.2 as it has been already stated multiple times since : new raid tier, new encounter design, revamped accessories, revamped materia system, reworked tank damage calculation... Literally everything could change in 3.2.