If the team were to pull a "WoW-Cataclysm" and use an expansion to essentially redo the existing world and its assets, I'd happily buy it and continue spending all my game time in XIV. I truly adore a great deal about XIV and would be very happy to keep playing it for years and years provided they fix housing, update the hardware infrastructure and graphics, and continue putting out excellent story content.

I'd also be super-stoked for them to do an Ivalice-based actual MMO with the grittier/tragic atmosphere of the original FF: Tactics. I'd buy it in a heartbeat. If my machine at the time couldn't run it, I'd buy a new machine.