The Old Republic does this too, and it makes those earlier worlds so much easier when you come back around for whatever reason. It would be nice to see it in XIV as well, but I could see where it wouldn't be fair to newer players (PLD in particular) if you could use your full level 60 toolbox in Haukke or Sastasha.

Worse, imagine what a leveling WAR or PLD will be up against if BLMs are stacking up on enochian and SMNs are painflaring left and right...