Find Duplicates would be handy in the swatches panel.
Got no answer for you but hope someone else knows how.
I agree. I like Illustrator's option of being able to sort my swatches myself with color groups. I too have the annoyance of having everyone else's swatches mixed in with mine when I syncronize my book documents. I just have to be sure to name all my colors. Having the swatches panel be more like Illustrator would be a big help in keeping things "clean and simple".