Thank you! Regarding Mr. Bennet's and Murray's rather ambiguous words about Mr. Wickham's death, it is a part of the story I struggled with, and I'm afraid in the end I'm as much in the dark as you. It is one of the few details Mr. Bennet would not elaborate upon, so it must remain a mystery.
As to the suitors, I believe it goes back to Elizabeth's belief that people are ever changing, and there is always something new to discover in all of us. Mr. Bennet is merely finding a way to become more involved in his daughters' lives, in his own inimitable way. I believe he referred in this instance to Mr. Darcy in particular, as well as Bingley and Fletcher. I don't think you missed a thing.
I hope I never ridicule what is wise or good. Follies and nonsense, whims and inconsistencies do divert me, I own, and I laugh at them whenever I can.