I would like just some easier way to go prone. When you are in battle and you need to go prone NOW, but you have to look around to find enough space to do it its annoying. Yes you could turn a few degrees so your body can fit, but doing so takes time and ends up getting you killed.
For example I was playing on a snowy map with territories (cant remember the name but you get the idea) and I was taking cover behind a car to the left flank of the map for Russians. As I was there I saw 8 Germans rushing my position, I popped out of my cover and began to fire. After taking out five of them, I noticed to my left there was a guy aiming right at me. I quickly went down into cover, but noticed my head was right in where the windows are on the car, leaving my head completely exposed. Naturally I start to hit prone, but all I get is Cannot go prone here!. So I start moving around, spamming my prone key, trying to find space to do it so I don't get my head blown off (even though there was clearly enough space). As I am doing this all I get is constant Cannot go prone here!, leaving myself exposed as I am frantically trying to not die. Anyways, it did not end well, and I ended up painting the snow red with my blood and brain matter.