Basically I want a spherical deadzone so I can rest my head naturally without the game moving at all. This makes aiming with your weapon or lining up a shot with aircraft easier because the weapon or aircraft's hud is solid and centered, where it should be in a game. (My opinion

You can do that now, but...
The problem I have with the current system is the deadzone follows along the entire x or y axis. So if you have your head looking right and you look up and down it stops in the center and feels unnatural. Or if you look up at the sky and decide to look left, there will be a pause at the start due to the deadzone.
I drew a little picture in paint even though I think it's a pretty simple concept.


*Maybe even make it a 3D deadzone? (Sphere)
Ps; If there is something that does this, great! But I didn't find anything so that's why I'm posting to see if I missed it.