This a great idea that has been raised a number of time. It would help a ton to have some kind of NPC template, perhaps adjusted by age and success. We have had to guess and deduce a lot of things, like expected Rune Point amount (the typical competent adult, at least in the Dragon Pass region, seems to be an initiate with 3 Rune Points and 50-75% in important professional skills) and Spirit Magic knowledge.
Even if not an official product, a well-made Jonstown Library publication along these lines would be helpful.