I was talking about the release date with my friend earlier and we had said that Ayu probably isn't disclosing the release date because it would just get pushed back. So for me, it's better this way so I wouldn't get disappointed if the date gets pushed back XD
As for the #1 discussion, I think that the #1 spot is important to Ayu, as it would be for anyone, but I don't think that GUILTY's #2 spot affected her hugely. It probably just gave her the motivation to make even better albums in the future. I look at it as a learning experience