Unconvincing romance
I just saw this for the first time and was unconvinced that a man like Ron would find Carrie all that interesting or attractive, instead of finding some boho nature girl (wait - I guess there weren't any in CT/Long Island/wherever this took place). Sure, she took a polite interest in him at first, but what was really there, other than her being a bit more genuine and less plastic than her peers? She's not part of the country club...she doesn't own a TV at first. I guess that was supposed to mean she was less conventional than many of her neighbors.
I get that inner beauty matters, yada yada, but I was thoroughly unconvinced that a hunk like Ron should be riled up by a rather plain, older woman - to the point where he's talking marriage without hardly knowing her. If Carrie's character had been written to show a bit more personality, spunk, etc. I might have understood it more.