I love the simplicity of your rules and they explain Charlotte’s doings very well indeed! Mr. Collins has not much time to annoy his wife between working in his garden, writing sermons, composing delicate compliments and watching out the window of his book room for passing de Bourghs while walking to Rosings nearly every day. I agree with Lizzy, Charlotte has learned to manage her husband well and to advantage most of the time. Some other bits of management I noticed were in chapters 29 and 33. First, Charlotte saves Lizzy and herself embarrassment by settling with Mr. Collins that she would introduce her father, sister and friend to Lady Catherine. Then in Chapter 33 Charlotte prevents Mr. Collins from pressing Lizzy to drink tea at Rosings as she saw that Lizzy did not feel well. ;D

By Chapter 32 Lizzy’s attitude towards Charlotte’s marriage has not miraculously changed from vehement disapproval to approval but she has recognized her friend is content and even happy despite living in circumstances which she personally would not abide. It seems to me that Jane’s advice from Chapter 24 of allowing some difference is situation and temper and seeing the Collins happy together has brought on acceptance and tolerance if not approval. I think Mr. Collins got a wife better than he deserves; I do not think any of his cousins would have been as good a wife to him as Charlotte. Lizzy, need not be explained, I do not think Jane would accept him either, Mary is too much like Mr. Collins to make him a good wife IMO and he would never consider Kitty or Lydia. (;D) When Mr. Darcy compliments Charlotte by saying Mr. Collins was fortunate in his choice of a wife Lizzy replies:

"Yes, indeed; his friends may well rejoice in his having met with one of the very few sensible women who would have accepted him, or have made him happy if they had. My friend has an excellent understanding -- though I am not certain that I consider her marrying Mr. Collins as the wisest thing she ever did. She seems perfectly happy, however, and in a prudential light it is certainly a very good match for her." (Chapter 32)