I think she needs to release the full version of Rain (acoustic orchestra version) that she used in the ballad medley of LIVE TOUR 2006-2007 ~second session~. I really love that version so much and it would be epic as hell in full, I think.
Kuu's songs sound the same? Maybe singles, but she leaves the more experimental songs on her albums because the ones she releases as singles are usually songs that they think her fans will like. That's why they're usually the same, but I really don't care if they sound the same because I still think that the lyrics are more important than the music itself. :>