As much as I want to see changes to the existing landscape, I do have to admit that environment design is one of the most expensive and time consuming aspects of video game development, and as such we probably won't be seeing any changes to the environment any time soon, if we see changes at all. The only way Blizzard was able to justify their redesign of the environments in WoW was by passing the whole thing off as a full-blown expansion pack, and I just don't see that happening in FFXIV.