The Dr Pershing thing, a couple years ago hadn’t it been decided it would work better as a separate side-story in-between the books, like Book 5.5 or 6.5? That way we wouldn’t miss (IMHO) the best thing season 3 gave us AND we wouldn’t have it being shoved in the way of other character’s stories (since, sadly, it truly WAS an absolute side quest after all, which tbh is no detriment, 'cause it was still way better than the “main plot” of the entire third season, if there even was a main plot there).