On mine it's a sub-category under Library/Tags & Playlists.
Yes, I meant that tags & playlists apply to the 'library' operations, but yes from user standpoint it should not matter if library or my computer.
To add "Or", at least for path/filenames, use semi-colon.
new filter > path/filename: doesn't contain > \staging folder1\;\staging folder2
it should work with other fields as well. Filter is basically like a global auto-playlist.
Another method that could work is to assign new tracks a specific classification or genre (like Quality: Stage 1). This way you get a dedicated node, but then you have to remember to update classification after you finish (instead of just auto-organize out of the staging folders).
Of course all of that is just changes in workflow, none of the above addresses the problem with modifying the file date.
I'll add a report shortly.