Lift systems?, Castle walls. Stone Walls / cinder walls like arma 2? more storage options like sheds or barrels for fuel or water. maybe the ability to make your own blue water barrel that fills when it rains
i agree introduce a cloth material to make bandages from or be able to shred clothes cloth then make bandages like in h1z1. i would also like to see insta docs changed to med kits where they heal you over say 10 mins rather than instantly.