I wouldn't mind SE adding weather, it's just one of those thing that will put the game over top. Most ppl would overlook it but their are a few of us that will take notice of it since the little things do matter and can be a factor in a game success, take for example the grass in 2.0 how many have said something about it probably enough for SE to take action. Plus if SE has geomancer on their minds weather effects could really be big in the game not just for crafting etc.