In our environment, we roll patches out based on Organizational Views. In most cases, we have automation policies that sort devices into these groups, but there is one particular device type that we have to do manually for a few reasons. As a result, I've built this quick and dirty report for IT Analytics that shows you any devices that aren't in any Organizational View/Group.
If you use it, you'll probably need to update the data source to be your own report server.
Enjoy!