Ul'dah should have an aethernet shard by the market.

[Atlaworks]

But on the other side Ul'dah and Gridania have GC headquarters near aetheryte which is very useful for squadron management and daily turn-ins, while Limsa has it in another zone.

How about some aetheryte in Hinterlands, the most inconvenient zone to get into? It actually already there in center, just inactive.

You're looking for the Aftcastle aetheryte in Limsa. Takes you right to their doorstep.

And people have been asking for a Hinterlands aetheryte for forever now. SE said it was supposed to be Idyllshire, but it's still pretty annoying and inconvenient.