I like Seaver. She isn't my favourite character but I am ok with her. I don't think she looks like JJ's twin. I can tell them apart just fine and the actresses play different roles anyway. I am fine with Rachel not changing anything. The idea of her having to look different is unrealistic to me. I know more than one blond person with long hair and the same build give or take. Why should people not look alike on TV shows? We the fan base are smart enough and observant enough to tell them apart.