While I do find it interesting to try to see things from a historical perspective, or from a perspective of different characters, I tend to favor the views of the omniscient narrator to the best of my understanding of her, when one can determine it is the omniscient narrator speaking (again, the complexities of determining every point this occurs would be a different (and very long) discussion.)
I like your thoughts on your point 1. Mr. Darcy is a complex character in that comes across as so proud, but yet he is willing to disregard that for the love and commitment to someone like Elizabeth who would not be something to be proud of or promote in many high-class circles. And he is a continual fascination, since it is such an astonishing action. I can reread that all the time to try make sure I understand it, but I don't know if I ever truly will... will just have to read it again! On 2. I don't agree with the shy part, but introverted, yes. And I don't really like the word "inarticulate". I'd rather think him as "nonconversant", or something. Darcy does have at least one other witty quip, and that was the line to Sir William Lucas "Every savage can dance." For 3. I tend to agree Denny wasn't in on Wickham's scheme. For 4. I tend to think Elizabeth was realistic in her reaction, but again, this is part of Jane Austen's genius that we can look at that and debate forever... we don't have enough evidence to determine (not enough 20-20 hindsight!) if this was Charlotte's best lot in life. Elizabeth was different than the omniscient narrator here, since she had just rejected Mr. Collins herself. She needed to reconcile the match, and Jane Austen gratefully gave us some insight into the Collins' world later (although it was not a definitive picture), where again Elizabeth rejoiced she was not in it herself, but she could not determine if she were Charlotte, she should regret it. For 5. I agree that the narrator is not always the omniscient one. And 6 and 7, I like both Bingley and Mr. B. and consider them both in the best possible, forgiving light. It's all water under the bridge as to their defects, since those traits, good or bad promote this wonderful story as it is, and both characters end up pretty satisfied all things considered.
Thanks for sharing!