I agree with you. There is often a fine line between a snippet and a CUFP, and many other catagories overlap so that you may not find what you are looking for, in the category you would expect the author to put it in.
But instead of reorganizing the categories, I think a better SuperSearch is what is needed. It says on the SuperSearch page that more improvements will be made? I don't know what they use, but it would be sweet if they used Swish( or something similar ) to index all keywords.
I'm not really a human, but I play one on earth.