The latest Lodestone lore update is about the effects of Dalamud on the aether of Eorzea. There is a line

"Domitien hypothesizes that the disturbance could give rise to peculiarities among monstrous wildlife, as well as alter the flow of aetheric energy. This last point is especially worrisome, as the “rivers” of aether that run through the land are what make instantaneous travel between aetheryte locations possible. Should the aetheric flow become sufficiently warped, it may well prevent us from using aetherytes altogether."

This makes me think that teleporting is going to be changing in 2.0 to at least a minor extent. I'm fairly certain that we've heard Return and Teleport are staying in 2.0 and that you unlock the ability to use them through a quest so I assume the change would have to small. I suppose it could be something like teleporting is only possible from certain locations, from point A to B for example.