How about a free-moving focus point controlled by the shutterbutton?

On 22/08/2016 07:54, RichA wrote:
The shutter button could have a joystick function that would allow a precise focus point to be moved at will. When not in use, the shutter button would lock in place for normal use. If it was sensitive enough, it could move the frame width with little side to side movement of the button, thereby not compromising shutter button push ergonomics. It would help preserve composition because you wouldn't have to accommodate movement of the frame to secure a desired focus point.

Already provided by the touch-screen on some cameras, with the advantage
of direct visual feedback - i.e. you tap on the point rather than moving
to it with a joystick.

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Cheers,
David
Web: http://www.satsignal.eu