^If she composes and writes lyrics but never releases them, as far as her career and public image is concerned, is like she does neither. I wouldn't be surprised to know she actually aproves everything she releases (actually, I would be surprised if she didn't), but I don't think she goes as far as changing lyrics and arrangments for example. Even because a huge part of her current discography is in English and as far as we know she doesn't really know the language.
And I don't get people complaining Ayu praising her releases, what do you guys expect? "Hey, this is shit, but buy it anyway, plz? <3"
Not that I think her current releases are shit, anyway, Party Queen still among my favorite albums and both Colours and A ONE are perfectly crafted pop albums, even if overly safe.