The conversation is really interesting but calling her a "has been" seems a bit unnecessary. I agree with so much here except that Ayu has performed quite a few songs from her discography when you look at the big picture. But it sometimes feels like it's the same songs. The list posted earlier shows the reality I think.
I personally feel the brand of Ayumi Hamasaki is poorly run the past few years. I don't understand what Ayu/avex is thinking anymore. As a fan I just feel confused and disconnected.