I am 100% on board with the OP.

The current system seems like it was a quick fix for getting around before Chocobos and Airships.

With access to other modes of transportation, teleportation should be restricted to between Aetheryte Crystals (and out to gates).

Teleporting is a tool for casual/solo playing, so I would like to see them eventually remove the 'teleport your party' option as well.

At some point, give the PT teleport ability to a job (Time Mage )