I don't believe that this is possible, but I will ask around.
I would assume that the full-page highlighting was removed so that pages could be previewed as close as possible to their actual output. The functionality of the page tool has changed significantly since CS5/5.5, and is now used to change not only page size but also to preview different screen sizes.
EDIT: grammar and clarity
The major change is that it’s used to select object for setting liquid layout rules.