If HUD markers are disabled it's impossible to use the sync shot function. Very annoying, every time I have to temporarily enable the markers if I want to make use of this feature, and disable them again.

General HUD improvement: split the enemy markers (red circles above heads) from the other HUD markers option, so you can disable the enemy markers separately but still keep the objective markers on your HUD. As I personally would really like to turn on objective markers (but not enemy markers!), to be able to find that little note on a desk or the specific painting where to place a bug instead of going to the big map again and again trying to pin point the exact location and failing miserably.