This has always bothered me on a deeply fundamental level. PLDs should be MT'ng, even more so in proper difficult content. Using a shield to protect your allies, being the epitome of MT. I think most people start this game who want to main PLD have this kind of fantasy in mind. Same with WAR: big berserkers who throw caution to the wind and focus more on damage than tanking. They should be the best designated off tank.

Please, make sure this happens in the next expansion. Make sure PLD is always the optimal MT and WAR is the optimal OT. DRK will fit perfectly inbetween both, and be MT with a WAR OT or OT with a PLD MT.