Okay, i don't know much about other MMOs, but there always seems to be another playable faction. I think WOW has two, can't remember what they call them but they are basically mirrored for PVP reasons.

How about an entire playable faction on the Garlean Empire side where basic character models can remain similar but at character selection you have to choose an allegiance.

Three new starter cities and zones, would be like doubling the game, but mirrored abilities wise. You can all imagine what playing a Garlean would be like. I think it would be pretty sweet.

Eorzea Vs Garlemald PvP!?

Eorzeans could have the primals on their side with the Garleans having their machines.

But to remain more on topic, i can't see much past Female Roegadyn at this point. Maybe 2-3 years away for more.