In Podium, our teachers had their own web pages and were able to go to the pages and add, delete, modify content.  With onMessage they don't have access to a page but only to the content area (have to navigate to the content area to change it).  It would be much easier to edit a webpage (again for teachers without having to give them platform mgr status) and edit right from the page so they can continue to see the page, how it looks, etc like I can as a platform manager on a detail page that comes off a resource board tile.