One thing that has not been done yet with FFXIV

[Dzian]

A entire zone underground, and a underground city player hub.

I hope that will be a thing with the Duskwight Elezens if they ever get a chance to shine one day.

Labrynthos is underground, The temppest too. (well technically thats deeeep under the ocean)

There's tons this game doesnt really do though, There's no real indoor zones, no real dungeons or caves, no real forests.
If it aint a big open empty space, It's tied to an instance..

Compare it to say FFXI, In Vana'diel you had Outdoor zones, Indoor zones, Sky zones ,Sea zones, A freaking volcano, Castles, Defkaults Tower, Mines, Caves like Sea Serpents Grotto. Emptyness zones like Promyivum, Aquaducts, Sacrarium, Citadels ,Giant trees, Underground nests, Underground waterways like Toremai Canals...

Sooo much variety in the world.. XIV and Eorzea has none of it.. Not to mentions all the mechanics that bought these zones to life.

How cool would it be to actually be able to go into the Copperbell Mines and do some actual minng with your miner, or even do botany in a giant tree or real dense forest. It would be so much better than the hitting a random rock with your hammer

But yeah even Labrytnthos is a big open empty space doesnt feel underground or anything at all.

I've never played an MMO (or any game i can thinnk of) with a world that felt as alive or diverse as Vana'diel. and thats a world thats 20 years old.... all these modern open world games are just massive hunks of lifeless emptiness.