So for my suggestions i'll start by just naming random thoughts I think would be cool to see. Mixed races for character creation, melee healer job maybe a surgeon, family tree like the party bonuses but mixed with the marriage concept, race choice of something with wings, oversized parties 8 people doing 4 man content, relic armor, dow/Dom advancing jobs to specialists>prodigy, more open world content like Choco races or moogle post quests. That's just some to get the ball rolling