Losing intellectual confidence and authority

I agreed with very little Susan Fraiman had to say about Pride and Prejudice, mostly because she provided very little evidence from the book itself, preferring to take examples from other stories, as well as what other critics had to say about those stories. Also she took a few quotes from Pride and Prejudice, lines that Mr Bennet said, out of context with what she was trying to show. For example when she uses the quote "I will send a few lines by you, to assure [Bingley] of my hearty consent to his marrying which ever he chooses of the girls" to show his "cheerful readiness to bestow his daughters upon anyone who knocks at the door." (72) I believe that she takes Mr. Bennet's humor much too literally, obviously in the effort of showing that Mr. Bennet has been contriving to marry Elizabeth off to Mr Darcy the entire time, which simply doesn't make any sense considering the astonishment that he showed to Elizabeth when he heard the rumor about her marrying Mr. Darcy. That's not the main thing I have trouble agreeing with, as my title implies. She states early on that Elizabeth loses any of the intellectual strength she had as the story goes on due to the ending result being her marriage, but I just don't understand how she could make that claim (largely without evidence) when Pride and Prejudice clearly shows that throughout the story she learns a lot about herself and grows as a person. If anything it's the other way around and towards the end she had grown so much that she is more of a wholesome and intelligent person. She realizes, via the letter that Mr Darcy gives her after his first proposal, that she has been very silly and prejudiced before then in the way that she judged both Mr. Wickham, like assuming that he had a good character simply because she wanted to believe that Darcy was a bad man, and Darcy and realizes that she never knew herself before that moment. Also she begins to realize that the way he father has run his household has been detrimental to all of them, when before she had chosen to mostly ignore the evidence and so she learns a lot about both herself, because she knows that she and her father are similar, and about the affects that an attitude like her fathers can have when in a position of influence and power over his daughters. I could go on, but I shan't.

Questions:
Does Mr. Bennet actually have an "obvious interest in the Elizabeth-Darcy match" (75) as Fraiman says?
Does Elizabeth become less of an intellectual being and fade into the background of her life due to her marriage to Mr. Darcy?