I'm happy to wait and talk about this when missions and things are a bit more stable, but I think it might not create too many big problems --- it would be a huge change to the pace of the game, but I think at the minute you're able to get things done a bit too simply and easily and it might be an improvement. Especially if wind shelters are going to be broken out from missions, I'd personally enjoy having the sense of having to make a difficult journey to get to the tower or to bring aid to my allies in battle or whatever.
Anyway I get that you've got a larger plan which this might not fit into, so I'll let this point lie now, but I hope we can get something in the game later that feels like making a long journey over land.