I always figured it was because she was so busy. Or she just doesn't want to put anymore effort into composing. The quality of her composed songs seemed to decrease after I am... anyways
(I'm not talking about CREA + DAI, just CREA). On Rainbow, I really like Heartplace. I think Dolls is a beautiful song, but it's wayyy too repetitive. And Close to you is one of my least favorite Ayu songs and she composed it. On MY STORY, while I don't really like Winding Road I think it's probably one of the most professionally composed songs she's done. I love Humming 7/4.. verses are great, but choruses are lacking.