1. Allow Chocobos and Retainers to fill in for DPS, Tank, Healing roles. Not as able or as good as Players but least help fill in for those leveling alts in the game with too few tanks and healers pre 50. (Might make the dungeon a challenge also.)

2. The theme seems between light and dark. Like Dissidia or similar too. With that concept why not take our expansions further? Release an expansion that discovers a new 'continent' for our characters to visit.
Like for instance, the recovering world of Final Fantasy Six with us helping the people recover from what Kefka did only to find out a new power coming to the fore trying to summon Kefka as a primal!
You can also add new races and classes as we visit per expansion like Espers from FF6 is a Job that allows one in the story to take on a peaceful and passive primal name Phoenix onto themselves so the Phoenix can experience life through a mortals eyes. A race would be like that bunny like race form FF12 was it?