Hmm, I would love to hear Daniel’s thoughts on this, whether they have considered such a usage. As Romanos pointed out, I don’t think one’s first inclination is ever to regard Print mode as the best place to do that kind of reviewing, and it wasn’t designed for that.
I would be all behind either an InDesign-style W view (I forget what the shortcut refers to by menu name, but it hides all guidelines and such) or Shift-W view (full screen preview).