New patch Revi gun sight vs old

[SNAFU]

The point is quite simple:

We aim with one eye, on a rifle, a pistol, 125mm cannon and so did the pilots back in those days and the pilots nowadays (the leading eye, even though we have a HUD-gun-cone or something else). But in the game we play with two eyes on a 2D screen. So how do you simlute that? I have got no idea, but the difficulties to keep you head steady for a clear aim is somewhat simulated the way it is now, I think. It is not how it really is/ would be, but the sum of the difficulties are somewhat a way, I can feel aiming is more than just moving a joystick.