I agree that fantasy elements add to the appeal of a game world... I think they did a pretty good job with it in FFXIV myself, but they definitely could have pushed it further. There's a huge difference between fantasy and unrealism. FFXI had sky, for example... The floating land of the gods... It was stylized realistically, but was a work of pure fantasy. It's only a matter of time before they add areas of this nature, I'm certain. Once there's actual endgame content we will probably see more of this... In fact, there already is some that's been made and just isn't accessible yet. An example is that there is a cave in FFXIV with a whole underground forest... It's like a subterranean ecosystem.

Some JP hacked the game and accessed the areas... It wasnt complete, but it was done enough to get a general idea of what it'll be like.