Initially I had added discomfort with each taper, not a lot but noticeable. My notes often indicate tiredness. Any pain effects would wear off after a few days. Toward the end, I barely noticed transitions, although my notes still indicated arm pain on some days. I stopped Prednisone in early July. Don't feel back to normal, but, really, at 80, "normal" is difficult to pin down.
It's often not easy to know what to blame - PMR, Prednisone, age, or those initial lawn mowings when the grass is long and wet. That said, with PMR I only had pain in my arms, shoulders and somewhat in the upper back. Since stopping Prednisone, there is noticeable discomfort in my legs that didn't exist before or during Prednisone, and may be a withdrawal symptom despite my slow taper. (See the forum topic Off Prednisone but Residual Stiffness - everyone mentions their legs.)
You could be a fantastic doctor with your observational skills and insight. Those notes you take are important if doctors have the time to read their notes.