Do you think ayu composes less because of her hearing?

[Bad Wolf]

It's an interesting idea, and I'm not saying it's wrong, but I personally don't believe it. I think her staff has a better idea of what sound/style she wants, after working with her so closely/constantly, so they know what to go for -- thus she doesn't feel as compelled to do it all herself. She still picks the songs personally, or tells the arrangers/composers what she's looking for, but she might feel like what they produce is precisely the sort of sound she's aiming for.

I think she did that most when she just couldn't find something someone else created that fit her vision enough.

Yup -- I seem to remember Ayu saying herself that this was the reason she took up composing -- nothing she was given really "fit" what she was looking for, so she took it upon herself to create that desired sound.