In an attempt to avoid overexposure by manual settings, it was surprising (to me) that 30 vs 60 fps gave shots of different exposure levels, even at the same ISO. Shooting at different frame rates reveals that in auto mode the camera consistently gets the same (over)exposure by adjusting the ISO. In place of makeshift manual exposure, it should take but a minimal adjustment to the camera's algorithm so it consistently gets optimal exposure in auto mode.