What could DRK have learned from FFXI?

[Reynhart]

The reason why his stat scaling is weaker as a Dark Knight is because you're expected to climb Mount Ordeals at the level 15-20 range as a Dark Knight and come down as a level 1 Paladin.

The issue is that DRK Cecil is not tankier that other frontliners you have in those level range, whereas PLD Cecil, outside of using the overpowered Ragnarok, clearly do less DPS than other frontliners at endgame.