Often analysts question how traffic is falling into the "None" bucket, figuring all possible traffic has been configured to go into one of the defined buckets. Having a tool to test referrer's, etc to see where these would end up, similar to classification rule builder test option, could be helpful in both configuring and troubleshooting.
FYI that I typically troubleshoot via the data feed with the condition tied to va_closer_id’s set to 0 (not documented, but assuming it means hit didn't fall into any of the marketing channels).
