Thank you for including having the Table of Contents inspector work with RTF docs. Love it. This will be a time saver! Of course, you do all this work, and I immediately have a suggestion. (Sorry!)
TOC lists all sentences that are fulled bolded or underlined. It would be nice to have a preference to specify if those styles represented headings or subheadings, and then have the inspector show this difference. For example, putting some linespace above a heading to separate it, and making the subheadings italicized or indented.