Yeah, i've been wanting to ask the same thing (about the progress, not WoW). Is this going to go anywhere or not?

I had an idea about the crystals. In most FF games there are Elemental Crystals, and 4, not 5, of them. Well prehaps you could have elemental Crystals again (No. 5 would be somthing like Dark). That way, it makes more sense as to why these crystals hold the world together, because the crystals hold the elememts that make up the world.

Anyway, it may be a good idea to wait for more info on FFTA2 to see what new story elements that will bring.