What would you add / change to the FATE system?

[Amnmaat]

they should have more of an impact for world building.

Would love a grand company system for the overworld; you can join the crystarium guard in lakeland, pixies in il mheg, etc in every area where you get gil for defending their camps. This would be a fun way to earn gil (but with a cap of 100k per day maybe? Even 50k would be fun).
But you're limited to 1 "open world company/camp" so it feels more special whichever camp you're defending, you also get exclusive glam from them.

A kobold glam is way overdue....
Sylph glam...

These are the types of repeatable open world content the game desperately needs. It's content that doesn't really need updating, it renews itself.