I would greatly enjoy it if night time changed the zone more. Lots more ambient lighting, fireflies, luminescent foliage, different enemies/critters, cricket type sounds, different music, etc etc. The zones are just so big and unchanging that something like this would really help, imo.

Also, seasons would be so amazing (I know it'll probably never happen). They can take advantage of their copy pasta terrain by making snow texture versions and so on. With their current set up, it'd be a lot less of an undertaking compared to other games (though still extensive).

That lightning from the weather demo way back in the day...is that in the game (besides the lightning in the Limsa intro)? It looked so cool.