Most of the years you said wont be open to they release a expansion ala mhigo and ishgard being one they said it would take i think 1year to make both areas.

So it save to say only the current areas was remade with added areas but still part of the same area. Each city have a few zones i think they said anywhere from 3-5 and each area is diff. So there a lot of exploration to do in 2.0