The thing is, there's already precedent for this within this game, back in stormblood players had the options to toggle the gaussbarrel model and animations on their character off, same with the ability to toggle bahamut sizes and carbuncle on smn, and theres plenty of games ive played which has cosmetic animations (not fighting games like your example because their animations are an important balance point). The point about switching job, whilst to an extent true, it sucks to have an aspect of something you like get completely overwritten by a trait, when if it was untraited nothing would change from a gameplay perspective