I want to give an update on this. As described above, I moved this baptisia 'Blueberry Sundae' at a terrible time in July. Well, it definitely sulked for a season. I saw lots of buds coming up in the spring of last year, but only a few grew and one tiny flower stalk developed. Another year later, however, it's back to I would say close to normal. Lots of flower stalks and the plant is a lot of fuller. It's looking very good and I fully expect that it will only get better and better. The pictures below show the progress.
Blueberry Sundae in June 2020 (1 year after transplant)
Blueberry Sundae in June 2021 (2 years after transplant)
