I'm pretty much of the opposite opinion on Chessie, though I'm sure I might be on my own here. I thought she was much better before the surgery.
She wasn't exactly beautiful but she had something about her and was very expressive. Now she's just a generic plasticy looking bimbo with a face that barely moves. At least before she was kind of unique. Maybe it's because I got into her back in her early Killergram days right when she started out and just got used to her weird face.
I had pretty much the opposite experience with Sophie Dee. I was never particularly excited by natural teen Sophie, but once she went super bimbo I thought she looked much better.