Stories about work on the music side for versus/FFXV would be enough to fill a couple of books, really.
The credits list for musicians, recording studios, orchestrators, engineers, production assistants, arrangers, etc across the span of 10 years is hilariously huge. e.g. the choir from the original Omnis Lacrima recording is still in the game.
I don't think any of the other 'lol is this game ever coming out' legends out of the game industry (DNF, TLG, etc) have come from a franchise where the music is so much put on a holy pedestal as FF, but maybe I'm biased.