Tbh Ul'Dah will always be the center of attention. Why? Geographically it *is* the central city. If you have no anima (like me) you stay in uldah. If I need to get to limsa, its a hop, skip, and a boat ride away. If I need to get to grid, its the next map over. In grid and I need to get to limsa? [Return] to Uldah and hit the boat. Basically, its a central location and will stay that way (unless the 3 starting cities are geographically redesigned).

My vision for 2.0 is something where lower-levels tend to stay clustered in their starting cities, while higher levels will congregate in Uldah or other cities in higher level zones. As someone said earlier, there will always be a central area where players congregate. There almost needs to be, or finding parties would be a royal pain.