I don't know why people complain about them including those tracks.
I had listened to those bonus tracks of Youthanasia a few years ago (still only own the original pressing though) and I didn't think much of them at all. However on this album I found both tracks to be favorites, and Millennium of the Blind was far from finished in its demo form.
Black Swan I had never heard because I only have the standard American release of United Abominations. Also a track I very much enjoy.
I think complaining about Sudden Death is the most silly of all though, the way I see it, it was just an early single released. I had never heard it till the album release and I love it!
I guess for someone like me who usually doesn't listen to stuff until they have the actual cd in their hands, it's just no big deal