It would be sort of cool if they released it in a few years on a virtual console (or even a console) per-expansion. (RotZ, CoP, ToAU) Party members could be AI'ed pretty well, in the manner 12's were. A lot would need to be tweaked, remarkably more exp per kill for instance, and we'd have to become remarkably more powerful to deal with the bosses.

But the storylines would become a lot more linear though; even if Vana'diel remained fully intact, playing the game isn't as fun solo as it is with friends. It'd be nice to have something to switch on when you're really missing something like manaclipper rides though.