I love all those ideas, that's Awesome!
the sad part and what I heard from Brad is that the game cannot Handle it yet, or sorry what I am trying to say is that Today's Hardware cannot run the game with all those Effects in the game, that's why the game does not have them yet!
In the Future Maybe but not now, like I said before, the game need way more heights, having in the same map desert, snow, Terran, different weathers, rivers etc...
Nitrous Engine can do it but it will be too heavy for today's PC's.