What would be interesting in Harry “Going back to school” is him not as a student, but as a teacher, as a subplot.
Everyone is going to be interested in magic after BG, including the University. Irwin’s mother Helena is a professor of archaeology, she should know the anthropologists, what if Harry were invited to be a visiting lecturer in anthropology, specifically magic. Harry has always had an enormous chip on his shoulder that he only has a GED, this would resolve this issue as well as open up new issues both within the White Council and the University. It would be nice that Twelve Months ends with Harry being awarded an honorary degree, or even a doctorate. Doctor, Sir Harry Blackstone Copperfield Dresden has a nice ring to it.
And of course Jim could use his Summer Knight Story of becoming famous in fandom, where he had previously dome panels to empty rooms, is late for the Summer Knight Panel, but there is a crush in the corridor, so he patiently waits at the end of the queue which turns silent until
Some asked “er, are you Jim Butcher?” To find his room was packed and this was the overflow.