I was not able to start my re-read until last week, and I've spent some time reading through many comments here. Something that has been niggling in my brain is Sir Walter as a father and grandfather.
He adds Mary’s wedding to his Baronetage, but not the births of either of his grandsons – and one of them is named after him. There has been no evidence that he sees the boys or Mary often either. They can’t inherent his Baroncey, so they are little to him?
On the other hand, the Musgroves, by both proximity and their nature are very involved with the children. They see family as people and engage with them, not just names and titles and dates to be added to a book. The discussion of Dick Musgrove below had me thinking that JA may have been contrasting the love Mrs. Musgrove has (through rose colored glasses since it is the memories she chooses to remember) for Poor Richard with the lack of affection Sir Walter shows for any of his daughters or his grandsons.
He favors Elizabeth, but if he had true affection for her, he would (IMO) realize the situation he was putting her in as an aging woman with a lack of funds. Where does he think she will live after he dies? Such a selfish man who in my eyes, is a selfish villain.