It's quite neat with engine sound and the rest of the sounds that when you change view direction you hear them at different volume and 'direction'. How ever it serves /no/ purpose for the stall sound, in fact it makes the stall sound even less usefull.
If you're riding the stall in forward view and then switch to rear view the sound is played at substantially lower volume, meaning you can pull more back on the stick. Well not really, cause you just spin out if you pull more.
So could it be possible to play the stall sound at constant level regardless of head position? In real plane the ( stick ) buffeting doesn't change when you move your head, and that is something I would guess you use as feed back how close to you are to stalling.
//fats
