This wouldn't have the effect you're parodying. The field areas weren't designed without flying and aetherytes in mind. Even 1.X had teleporting, although you had to wait for anima if you ran out.
I'm not talking about the distance either. Travel distance even by foot is very trivial, and the game offers other methods of skipping some of the distance like airships and boats. The overworld isn't designed to give an immersive sense of traveling across continents. And even if things were spread farther apart, there is zero sense of danger anywhere to force players to socialize to help each other move around.

Their design direction for field areas would have to change a lot before restricting flying and aetherytes, and they would have to overhaul most of their MSQ since they require a lot of teleporting back and forth across nations. Not that it will ever happen.