The container() renderer encourages developers to render text that is not appropriately tagged as paragraph text. This would be a simple thing to add. Or if not, at least discourage instructions and other text within bare divs.

// similar to the heading renderer

heading();

// to replace container() as a default text function to print a block of text

paragraph();

Context: http://docs.moodle.org/dev/Standardize_classnames_and_layout_to_facilitate_theming#Add_a_paragraph_renderer