[Kazeyomi]

^
Yup, using different composers/arrangers for once would be like a breath of fresh air.
But I don't think it would be good enough to getting huge sales.

I agree with those who said Ayu could never be relevant in pop music nowadays. But I don't see it as a huge failure.
I think Ayu achieved a lot during her career and life so far, actually it's much more rewarding being a living legend rather than a popular singer. I've listened to many popular female jpop singers through the years, but most of them quickly being forgotten or they just quit with music.

Would be cool if she would sells tons of copies like on old good days, but I think she's doing well anyway.