Seriously, I hope the dev's read this and are like "fans love chocobos so much, we should add them to our game to make them happy"

Chocobo's in Vanadiel are generally happier than Chocobos in Eorzea, good things news doesn't travel between the separate universes. We'd have Eorzean chocobo refugees eating all the gysahl green in Vanadiel...after they figure out nuclear space travel or "materia" space travel.