I think there's no turning back when it comes to existing content.
But I would want to explore the wilds of an uncharted continent far from Eorzea which has no aetheryte network established. This would be the island of old-school mmo adventures. A vast place with danger and no shortcuts. Rare monster drops, NMs, etc. Optional for the people who to play that kind of thing, while not interrupting the faster menu-driven teleporty, DF-popping Eorzea that other players enjoy.