Campaign tracking codes - for non-techie users
Have a button on the HTML editor to add the 'e-mail opened' tracking code within an image tag at the bottom of the page (just before the closing body tag) for those users who have been selected by their bosses to manage campaigns and are not HTML savy.
I encounter this problem all the time with clients. They are just not able to get it right.
Also, add similar functionality for the Campaign Redirect URL merge fields. Right now, you need to add the merge field syntax to the "href" attribute in a hyperlink. It would be much better if this were done automatically when you add the merge field.