I have no problem with wings, but there are some issues that SE would have to workout first

  • Symbolism: Type of wings aside, the concept in general are usually associated with Mary Sues and F2P games. That is something that can't be fixed easily
  • Genetics and Lore: For starters, none of the playable races have wings. And the game prides itself on giving explanations for most game play stuff. And the more aetherical wings would likely be functional or temporary (see the Seraphic Wing prisms). In this regard it would be easier to implement temporary wings, but I doubt most people who want wings would have this in mind
  • Obtaining: Given the Mog Station I'd imagine that some people would be furious if the wings were only obtained there (see: the first point) and given the reaction to the Samsonian Locks and the method dog getting it, I'd say people would also be mad that its RNG based (again) and lottery boxes would get the worse of both worlds
  • Redundancy: Consider this: Flying mounts exist. And I think if they are gonna add mutations to player charatcers it might make more sense for these mutations be for purposes other than showing off.
All of this means that Wings are one of those types of games where the only winning move is not to play.