Rather than being a "snob" I feel like she's just ambitious and driven. She seems like the type of person who pushes herself to be the best. She kinds of reminds me of Hori a little bit. I feel like she's frustrated that she's kind of in a "middle tier" position in 4th gen and isn't out in front like Sakura, Kakki, and Ayamen. And it seems to me she that she feels what she's been doing hasn't been working and so now she's trying to change her character to try a different approach. So she's trying to change the brash imouto image she had before into something else and be more adult-like and elegant (hence the new hairstyle). I don't think its a good idea though, I think she should just be herself.