I can't even remember the last time a game I got had a manual that was actually worth having. Probably back before Working Designs went under. Those sonsamaguns knew how to make manuals!
A lot of old PC games had really great manuals too, but of course they went the way of the dodo a decade or more back.
So, while I think it kinda sucks, I can't really get too worked up over losing something that hasn't really been so great lately anyway. Now, when they stop including discs in there, that's when I say "screw you guys, I'm goin home." Digital downloads aren't MY future.