Akihiko Yoshida is the lead designer for FFXIV, his designs from FFT, FFXII, Vagrant Story, or even Tactics Ogre: LUCT would work very well in this game.

But Tetsuya Nomura's approach to the FF franchise (FFVII, FFVIII, FFX, FFXIII) is more contemporary and punk influenced. It's not a good fit for Eorzea.