I really don’t want to read any negative criticism of this plot point. This is wonderful. This is beautiful. This is absolutely perfect.
It explains why Bing hasn’t been going to his classes; and it gives Jane power; and it is the dream of everyone still in love with their ex to have him come back and say he was foolish and he still wants you; and it supports Austen’s tendency to reward good people with the outcome they deserve: realistic or not.
So, no negative criticism of this one, please. Even Grouchiest of the Grouchy and the Grumpiest of the Grumpy root for Jane’s happiness.