These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: With Rudi and Mathilda getting together it could be said that three of biggest "kingdoms" in Oregon are being united.
All three major dynasties will have blood ties via Rudi and Mathilda's children, with additional kinship ties to a fourth (the Dúnedain Rangers). And a fifth (Mt. Angel) is brought into the fold (in about the only way it could be) by their choosing Father Ignatius as Chancellor.
Jerkass Woobie: Arguably, Sandra Arminger. She is, by her own admission, not a nice person, with murder and blackmail being just a few of her morally-dubious choices. And yet, in the later books she comes across as rather lonely. Though she lived for at least 20 years after Norman's death, she never remarried, and, as image-conscious and politically savvy as she is, it seems unlikely she ever risked her reputation by taking a lover. She is one of the last atheists in her society (though she comes to recognize the validity of religion in her universe, she has a difficult time accepting it in her heart); she cannot admit it publicly, and it separates her, not only from most of her world, but also from her beloved and devout daughter. Among her peers, she is respected (deservedly), but not liked or trusted (also deservedly). She seems all-too-aware that her descendants will have no very clear understanding of how people like her think; indeed, as she's very clever and somewhat alienating, most of the people she knows have no very clear idea of how people like her think. It seems as if she has no real companion after losing Norman.