The flaw I see with that is that when you leave a turret it might be in a position that effectively blocks the view. Ball turrets in particular seem to have limited visibility and if it were facing the wrong was when last you moved it, the view from the preset might simply be of the inside of the back armor plate of the ball. Normally I'd expect the turret would be in constant motion with the gunner looking around.
In addition, most hat systems on joystick's have trouble displaying more than half a globe's worth of views and on many bombers you'd need a full globe's worth.
I am also not sure how well that would work for people with TrackIR.
With trakIR the view hat still functions I use both.
Moving to a turret obviously sets your 12 view with respect to the direction the turret is pointing. I think a system that allowed you preset hat
views from different perspectives in the AC (that include gunner positions) from the cockpit would have to set the view reference of the ac and not the current position of the gun.
If you wanted to fire the gun you have to
move to it and once there you may have a diferent set of views to those you have set using F10 from the cockpit.
If (from the cockpit) you want only the gunners
view perspective (e.g when looking back, or back up, or back right etc etc) then you can flick around the ac using such preset perspectives as you have configured in the cockpit using F10 as JUGler indicates.