Ishgard will be truly worthwhile if they separate it like they did Jeuno in XI. Where it basically spirals up an down, following the way the city is build already. As of right now, the lower areas of Ishgard just disappear into a mist, no idea what may be lurking down there and in that, by exiting Ishgard's subterranean gate, into Dravania itself.
I would truly like visit the Scion's origin city, Sharalyan, hopefully there we'll find a library that chronicles all subjects of in game lore, which they can gradually release to players as we build up a reputation with them, much like we do with the beastmen tribes currently.
The other city like place I truly want to visit though, is the Garlean's Imperial Captial. I imagine it'll be something akin to Arcadia from FF12, which is fine.
