Yeah, Brandi is definitely an interesting character to have on the show. I'm intrigued to see what happens when she becomes part of the main cast.
I'm very hot/cold with Kyle. I did not like her at all during season 1, but throughout S2 she became a lot more likable. I liked her friendship with Taylor, and it was nice to see her not be so hell-bent on being such a bitch towards Camille. I have read things that have made me presume that I'll probably go back to disliking her though, but I'll have to wait and see
I'm excited to watch Yolanda in action. From the clips I've seen I think I'll like her.