i agree, she should try to work with different producers with a different style of music in order for her to grow. Avex is good in a lot of way, they sure know how to produce their female artist, like Ayumi, koda kumi, otsuka ai and boa. maybe she could team up with boa, her friend on a single or two. I'm not saying H!P and Tsunku style isn't good, but just exploring the other music style will expand her knowledge and her experience in the music industry. trying new things and exploring will let u become better and learn more about urself. she doesn't have to stick with it, just let her find what is best for her thru these musical experimentations, working with someone else. she got a lot of potential, let's not limit it.
although H!P is known for their bubblegum pop music, they also been experimenting with other genre and style with their artists, but they just don't really pursue it that much. as long as they can help each of their artists find the best kind of music and style that would work for their artist, they should pursue it. but first, we need to discover their true potential and talent.
i'm sorry if i don't make any sense at all. i'm just thinking while i'm typing and my thoughts are always mixed up. hehe