Meh. I'm personally against anything that smacks of Nomura Fanwank (read: Technicolor Beltan McZipperstrap aesthetics) in XIV. The costume designs of his titles belonged there because they seamlessly fit in those particular worlds' cultures. From what we've seen established, XIV's cultural aesthetic seems to have the stronger Medieval European themes that Akihiko Yoshida is known for. This doesn't make it any less "fantasy" or even less "Final Fantasy™", it makes it a unique world in the franchise that will likely, down the road, be seen just as part of FF as any previous game's style.

Injecting designs that contrast with the overall world-building and culture that XIV has just to re-live our FF7/8/10 nostalgia makes about as much sense to me as tossing in t-shirts and aviator sunglasses for vanity's sake.