It'd be missing two of the things that made it overpowered, though. MP management isn't exactly something in high demand if your healer is doing their job right; SMN has enough already to restore their own, DRK's is just a gimmick, and BLM completely dismisses the whole notion with Umbral Ice. Then, there's the En-spells, which would have practically no use in this game without a major rework, since XIV kind of made elements entirely useless and irrelevant.

FFXI Red Mage -really- wouldn't fit in with this game. Depressingly so since Red Mage's most useful thing, aside from their versatility, has always been Dualcast and the ability to learn it and slap it on another class. Unfortunately, Jobs offer no crossclass abilities here, so poor RDM wouldn't even be able to give us that.