The # 1 issue that timelapse shooters are facing is flicker. Using automatic settings is discouraged because the camera adjusts exposure in big steps (1/8 EV to be exact) that result in quite disturbing flicker when images are stitched together to a video. Interestingly, Canon compacts adjust exposure in much smaller steps (~1/32 EV), producing close to flicker-free footage.
Would it be possible to find out where this step size is defined and perhaps redefine it to something much smaller, e.g. 1/32 or maybe even 1/64 EV? Of course, lens diaphragms are not able to adjust in smaller steps, but the shutter ought to be capable. I'd assume normal video would benefit from this as well (e.g. virtually stepless exposure adjustment in aperture priority).
If it turns out to be impossible (or too complicated) I would be very grateful for any insight you can provide as to why.