So if they're going to make mounts useable in dungeons:

[Powercow]

Will you be able to explore Alliance Raid locations as well? I'd be down for roaming through the Ivalice areas.

For now it's just the 5.X series dungeons, and we can already roam around the Nier raids after we've cleared those. Hopefully they'll allow us to poke around the Ivalice raids, there's a lot of neat little details hidden around those.