Sure would be nice if all the accordion items were expanded on the Stage. Unless I've missed something, the only way to edit the text of a component (e.g., a label or heading) on one of the collapsed items is to 1) drag the component out of the Accordion on the Overview; 2) edit the text; 3) drag the component back into place; 4) preview the page to make sure that you have dragged it back into the right place.
Of course, allowing the user to expand/collapse the Items on the Stage would also solve the problem -- but I'm sure that would be a more complex approach.