I agree.
I'm a Firefighter/Paramedic.
Physiologically speaking the odds of you regaining consciousness from hypovolemia due to trauma hemorrhage without any medical interventions (IV fluid volume replacement, supplemental oxygenation, positioning, etc.) are not good.
Things that are affected are mentation, voluntary control, core body temperature, visibility, etc. I think the slowly increasing graying tunnel vision with perhaps a blurried look, the headbob, and a slower response to your controller inputs would be more realistic.
I also agree with different damage modeling for pilot wounds. Not all were fatal. This could also affect the controls. (broken leg would make it difficult to use rudder or corresponding brake, etc.) Compared to the rest of the body, the head, while exposed in the canopy, is relatively small.
