@MACH5
I love your persimmon, really nice.
For What It's Worth.
I have over fifty seedling Diospyros virginiana - American persimmon, between one summer old and six years old. I have started a batch of seed every other year for the last seven years.
When I repotted in spring fatalities ran about 50% or higher. When I repotted late summer, or early autumn, I would have no fatalities, or maybe one or two if I did serious root work. Same with pruning, spring pruning often caused branch die back. Late summer or autumn pruning no problem. So far mine are too small to flower.
I believe all the persimmons prefer to not have transplanting nor pruning done in spring. Their roots look different than most species of trees I'm familiar with. I would be cautious about root pruning, and try to leave roots alone as much as possible.