I can see PLD, even as it is now, being the preferred tank in straight tank and spank fights that involve melee-range DDs. Divine Veil becomes a game changer now with the stacking regen, which can go a long way to alleviate the extra damage melee DD take.

Problem is, not a lot of fights are done with melee-range DDs right now. Even though many of them have become viable, the community has become so accustomed to the safety range-DPS brings that they continue preferring it.