Ya I think I would have to agree with you on this one, the inspector right now is somewhat awkward to use, if it was fixed up to look something like the way visual studios has implanted it that would definitely make things much more productive.
So, am I correct in thinking that what you're saying is that you'd like the category headings to be more distinctive?
So rather than using bold to distinguish the category headers (e.g. Aural, Borders, Colors and Backgrounds, etc.) from sub-elements you'd find it easier to use if these also had a background colour which would create more of a visual distinction between one category and the next?