Can't tell you how many times I've seen miqo'te/au ra with them complaining why they have their tail + this bunny tail just over it. Where does the tail go? Glamour it to look like the bunny one, tuck it somewhere, really there's any reason we could say for it to not show up if we had the choice. Again though, I agree... I don't hate my tail, I in fact love my fluffy tail... But some gears do get annoying and even turn a player off from wearing pieces because it's oddly clipped. Same goes for those weird hat nudges for our ears, just clip holes in the hat and let our ears hang out instead of giving us weird pockets(I'm looking at you Samurai AF hat).

tl;dr: I don't think we need it but it is a very nice quality of life change for when we would like to hide it and make the clipping not so noticeable. (holy crap this character limit is so small)