Promise is back with me, and in the last month, she has mellowed considerably. She's more laid back, and has less energy to burn. We went to the lake yesterday and went out on the ice briefly, which was enough activity for her for the day.
Today was her first day back to school and work with me. She spent most of the day sleeping. In class, she started to snore lightly, which was fine until she started whimpering too. Then I had to wake her up a bit so she wouldn't be a distraction. Everyone is glad to see her back and eager to get their petting in.
We came home and played a little and now she's settled down again. Unusual for the dog who used to come home and need to burn energy.