I think this is as definitive a compilation of Bowie's entire career as you could get. The compilers had an unenviable task, because if you moved too far away from 'The Singles Collection', fans would have complained.
However, fans are still complaining anyway, because there's not enough 90's/00's material on it. This is because you can only ever fit about 39/40 tracks on any double cd compilation.
Fortunately, they chose the "right" 90's/00's tracks to put on it, given the limited space, and replaced 'Day in Day out' with 'Loving the Alien', which was a good move.
So why not sacrifice the odd 1 or 2 weaker Eighties tracks to make way for more of the recent material then ? simply because even though Bowie's 90's & 00's works has been "A brilliant return to form", Bowie had more hits in the 80's, and this is compiled with the casual listener in mind.
Luckily, the DVD has room for the new material in spades, plus the two 'Best of 70's' Compilation cover the songs which had to be sacrificed from 'The Singles Collection' (apart from 'The Alabama Song'), so everythings covered one way or another.