^Personally, I have yet to distinguish the Lindsey Monroe from "Montana". So with or without her, whether she's with Danny or a fence post -- it doesn't matter. I don't hate her; dislike is a much appropo word.
Early season two, she was this headstrong, smart girl from Montana, trying to fit in with the New York crowd. But as the season/show progressed, she dissolved into this "kiddo" (arguing with Mac and Stella, jumping into conclusions, basically... acting like the kiddo of the show). So then what?
Imagine her not with Danny. Now, write a character sketch of her. Apart from her being from Montana, I can't think of anything else about her. But hey, it's just me. She's like Danny's third leg, always there but when you cut it off, you barely notice it.
Peace.