yeah, manuals are really bad now. Just using the Assassin's Creed 2 manual as an example, nowhere in it does it mention that you can find how many feathers you have collected. I read the manual and still didn't know about it until I saw it posted online. To get that menu in the game you need to go through text menus of seemingly unrelated text. Also, it's not mention in the game through a pop up or anything.
I mean, that's bad design, but still it is information you'd expect to find in the manual.