I don't believe you can get that at the moment -- normally I would group by Folder if I wanted to see the full pathname, but then you don't have the program sorting out which projects need a review for you. Send in your feature request with Help->Send Feedback or email
omnifocus@omnigroup.com.
If you're going to review the projects, you're going to need to look at the actions -- can't you tell from that which one it is?
Another approach would be to name them Misc-Family, Misc-Health, etc. The string matching magic ought to make that no more tedious than your current setup, as you wouldn't have to type the whole string, and you should be able to see in the review just which Misc collection it is.