Rather than try to shoehorn FFXIV into a VR mode, I think they'd be better off making a Final Fantasy VR spinoff game, independent of all the other Final Fantasy games. This saves them from trying to adapt FFXIV mechanics (such as having to look all around yourself for aoe telegraphs) to a VR setting for which it was never designed.

To be honest, though, I haven't been tremendously impressed with the VR games that I've tried. I'm not sure the technology is really there yet.