I don't want to sound whiney, but seriously - Ayu did "nothing" on A Classical.
Think about it.
The vocals are the same, just stripped and put on other arrangements.
She didn't even have a photoshoot as the cover is a drawing.
Nothing new to compose, nothing. She didn't even have to pick the songs herself. The fans did.
And I think it REALLY shows. I'm disappointed with A Classical :/ I had hoped for new vocals. I'll just consider it a free bonus
(Well she probably did something like approving/disapproving, but you get my point.)