I liked your long post - very well-thought out! But you surprised me with a couple of points. Would you mind if I offered my take on them?

I do not understand your words, "after seeking him in town" when talking about Wickham absenting himself from the Netherfield Ball. Are you implying that Wickham was trying to have a meeting with Darcy in London? I thought Darcy was at Netherfield the whole time?

I think your second meaning of Elizabeth's 'a less agreeable man would satisfy me' is correct. She would rather be jilted by someone who touches her heart less (than Wickham? at any rate, less than Bingley touched Jane's).

I did not understand Mrs. Gardiner's comment as you did. To me "I hope [] that no consideration with regard to this young man will influence her. [I]t is very improbable they should meet at all, unless he really comes to see her." meant that Mrs. Gardiner is hoping Jane is not coming to London on the chance of seeing Bingley again.

Elizabeth's response is the first time I see her attribute Darcy alone with the power of influencing Bingley away from Jane. Usually, she mentions both sisters and Darcy in the same sentence, and gives the sisters the first billing.