I normally don't care for those kind of things; FFT:A annoyed me with the whole "let's get back to the real world" crap...but I do like the idea of something like MYST applied to the FF series. Something along the lines of powerful Windurstians who write stories that come to life (in the books, like Myst), whether they know it or not.
edit: Probably because I have always wanted some kind of continuity between all of the games, and that would be the one cord linking them, thus achieving my desire.