Need a way to manually code valid HTML when the visual and text editor tabs let you down.
Switching back to the other tabs should also not undo what you have just coded.
For example, currently if you add rich snippet markup to the Text tab and then switch to the Visual tab it removes it all!
It would be great if you could say add a shortcode in the Visual tab, then switch to the HTML tab and see what it was actually adding. I know you can do this by testing/publishing the page and looking at the source code, but being able to edit it for correct HTML markup would be fantastic.