I'm finding that I need to develop new piloting skills to account for the head movement. They act in a way that is very realistic, and I now have to move my body counter to the aircraft movements in response.
Most of the time it's no big problem, but in a swirling dogfight, it takes a whole different level of physical coordination than I'm used to. You have to swivel your head to track where the target is going while keeping your body lined up with the shifting gunsight. I will learn how to do it intuitively with time and practice, but for the time being the AI have a distinct advantage in that they don't have to deal with any of that.
I have managed to get my first kill, but it took way longer than usual, and I shot a lot of rounds off into empty space before I was done with him.