It would not be possible to add a controllable aperture with these tiny lenses and small sensors. The problem is that stopping the lens down any at all from wide open would introduce more diffraction and soften the image. Some point and shoot cameras use internal ND filters rather than smaller apertures to avoid diffraction. Of course you do not get any change in depth of field with ND filters.I agree. I could even get along with the same sensor (which is already pretty good), but I'd like to see a controllable aperture and maybe an optical zoom lens.
To have any shallower DOF would require a bigger maximum aperture, a larger sensor or a longer focal length. The Mavic has a larger aperture and a longer focal length and thus requires focusing.