Placeable objects, and terrain alteration. I think it would be cool if there were more objects you can place like sandbags by wire and little things like that. It could allow you to set up defensive positions and stuff. In really enhanced games like Rush. Also, it would be cool if you could dig a tiny bit into the ground like dig trenches or something. That parts a bit far but it would be cool. And I think trench warfare like that would be cool. This could also go along with a map maker.