Unneccesary feature in my opinion nor do i think SE will implent it.
If they wanted to they would have done it already.
If u want another race, u can start another char and experience the game that way
but changing gender like in WoW from one moment to the next, i dont like that idea to be serious.
I like FFXI for being a very story given and atmospheric game not for being able to let u do such weird stuff as a race change, imagine everyone doing that, no thanks.
There are more than enough people out there doing just that, starting another char and i think it's an awesome experience to play "again" as another race, if u not up for that u probably don't need a race change either.