I agree with the whole "phases of the moon/space aliens" thing. For awhile I tried to figure out the reason for variations, and sometimes there is one which is great. For awhile I thought I might be having "LADA spurts" - making periodic insulin which skewed my results, but there was never a way to know for sure and given how little I was making when I was tested 3 years ago, I doubt it.
I was looking for answers to some particular craziness on here one day and someone responded something like, "there are a lot of possible reasons, but mainly I would just suggest responding to what's going on without worrying about why." Most of the time (except when there is an actual reason to learn from) that is what I do. I seem to go through "clusters" myself, where everything will be stable and then I need to make a bunch of alterations for a few days; mainly my basals, my I:C doesn't change much. I do encourage you to continue with your show pace of adjustments, because otherwise you risk the old roller coaster ride.
Fritz Perls, a famous Gestalt Therapist had a saying, "understanding is the booby price" - I think it relates to D management very nicely!