Ambient weather and effects
I would like to some type of random weather added into the game. I think games that do this make the world seem more realistic. If and when they expand the game maps it would be cool to see some different terrain and effects like snow. Especially up in the mountains. Skyrim did a really good job at that. Also, I hear birds out there somewhere, yet I have never seen one in the game. Hard to believe hellbugs and pows are the only animals left. And running water... Maybe add some streams. Also, razor rain would be cool every now and then. Force people to take cover once and a while.