Deleting files from the Reader
on the Reader is a simple thing, and I suppose it's a good point that the actual utility might not be all that great, but I too am in the "I want it gone when I want it gone" camp.
I'll even spot you that it's based mostly on a non-logical desire, but here's the question I see: if it's a simple thing, and it makes folks happy (however irrationally), then why
not do it?
As for the Book Menu thing, I think they wanted to be sure to offer the other functions in that menu, and perhaps didn't apply enough imagination to find a way to do so other than forcing us to go through the menu. Easy for me to say because it doesn't really bother me: I just go through the All Bookmarks menu to get back to where I was (when I didn't just leave things there to begin with). I can access that menu from anywhere by holding down the Mark button.
Of course, that means I'll probably wear that button out shortly after the Next button on the left edge.