Yes, it's almost as though Henry had to run away with Maria in order to emphasise how right Fanny was and how wrong everyone else was when they were trying to push her into marrying him. See, I KNEW I was right to refuse!
Go on, issy, forgive Jane! Difficult for her to invent villains of the piece who turn out to be more interesting than the supposed hero and heroine, but of course she couldn't have them winning out. That would never do.