Sometimes it would be better to review changes based on the raw text instead of the formatted text.
Example: Someone puts some XML code into the text, which disappears in the resulting formatted text. Someone else proposes to format the XML as code. As a reviewer I can't see if the change only makes invisible text visible or if the author actually changed or added the text. I may go to the post and open it in the editor to see the original raw text - which is cumbersome.
So it would be nice to have a raw view for reviewers.