^ Well yes, I own GUITLY, NL and A COMPLETE, I know that. But the PV was never included on an album before.
And I don't think that Mirror on GUILTY replaced Mirrorcle World as a whole song on any album, but that's just my opinion. I still think the Mirrorcle World single is "special" somehow and that because of her 10th anni, but maybe that's just my impression.
Crystal Ageha is right, that might be shutting out people who don't buy her singles, but I myself don't buy all her singles and still I think this would be cool. I kinda dislike when new singles are out and it's actually not really worth buying (except if you are a collector) since all the content will end up on the next album.
I personally am a bit sad later when the new album is out and I don't use the DVDs of the singles that were released before anymore..
That's all, just saying I like the idea.
(I still think everything off of the next singles will be on the next album though).