Who knows, it might even be a complete different style to play than the rest no? Maybe you start off as a rogue in Limsa from level 1 to level 50. Then meet yugiri in the main story line, then unlocking ninja.

This will completely by pass the norm level 30 job notion requirement to 50 but hey, games evolve around new things. In this way, new players get to actually play the new class while also being lore consistent.