I don't like the 4.11.1 gunsight view either: In it the broken ring due to head rotation only appears to be more realistic, but the contrary, in fact, is the truth.
The pilot inside the cockpit is a human, with a flexible spine and soft muscles. When he wants to aim, he makes adjustments of his body (trunk, neck, and head), so as to let his eye find the ring in the centre of the reflector. This is what happens in the game when we look
straight ahead in gunsight view: we see the ring displayed in the middle of the reflector exactly because the pilot's body is flexible. In other words, the "straight ahead" view in gunsight view has already simulated the flexibility of the pilot's body and his active adjustment thereof for aiming.
When in reality his head is turned slightly - for example, to the left - to the extent that the gunsight is still in view, that flexibility of his body is of course not gone. Neither is the adjustment activity if the pilot tries to aim at a target. Yet in the 4.11.1 gunisight view (the aiming view, so to speak), the body flexibility together with its adjustment is lost when the head is not facing exactly straight ahead, as described in this thread. The pilot's head rotates like a rigid crank fixed above the seat:
But no pilot is a crank-like robot. Imagine that you want to peep through a tiny hole in a gate, a hole as high above the ground as are your eyes, and that you have not approached the gate carefully enough for the hole to be precisely in front of your either eye. Of course you lean slightly towards it, to align one of your eyes with the hole. And it is
extremely easy! So it is with a pilot.
If it is said that the pilot's adjustment of his body would be much more difficult in the course of real combat flight, which frequently imposes on him Gs, side-slip, and so on, then I need to point out that this belongs to a completely different category in flight simulation, ie head shake effects, or whatever it is called. When however the aircraft is flying straight and level, at a constant speed, no such difficulty should be present.
Felix