Don't tell me what happens to her, because I have not got to that bit yet. I have heard, but I don't want to know the details.
I was reading about her and David just after their wedding. I had worked out their marriage would be unsatisfactory; I was just surprised how. She is really well brought to life. It was heart breaking to read her tell David that he is such a clever man and to regard her as a wife-child. It shows how much she worried about her insufficiencies and how they had lowered her self-esteem. Being married to someone as clever and energetic as Charles Dickens himself might do that to many women I expect. She might not be the sharpest tool in the box, but she had no mother to teach her house-keeping, and her father was negligent. He did not leave a will or actually very much money, and her education appears to have been all music and painting. Her father loved her as a charming child, but did not prepare her for adult life very well. When she struggled to do her housekeeping accounts and could not get them right, or concentrate on David's explanation, I did think think that she could master them if she continued working at it. David Copperfield mastered shorthand, even though that took him a lot of practice. Ordering servants to do what they're paid for, or giving them their notice if they don't, is something very difficult to do. She would have to learn how to do that too, though maybe David could do the actual firing.
Something that occurred to me is that Dora is actually like David Copperfield's mother. She was rather pretty, little-girlish, and easily dominated. Was this deliberate on Dickens' part. It seems a bit Freudian.
It is a really good plotline.