I'd rather she not take the Koda approach honestly. At the same time, UFA seems not to do much with the older girls (Kaori, Nacchi, Yuko, etc.).
I wouldn't mind Avex - they have Otsuka Ai, Ayumi, BoA, etc. - so they've shown they can manage a female soloist well. That would also mean she could rock at A-Nation and do another duet with Ayumi.
I'm expecting her to stay within UFA though, just not part of H!P.