I would be interested in and more importantly would buy a dedicated Sense accessory device that can be used to improve device detection. I have had Sense installed for about 6 months and still have a large pool of devices that are detected but not identified.
I imagine a small smart-sensor (picture the little chargers that come with iphones) that users could plug in between a single device and the wall socket. It would be used after a time period when Sense has had time to develop a number of detected but undefined devices, maybe 3 months or more. The smart-sensor could capture the unique signature of the appliance or whatever is plugged into it, communicate that to the main Sense unit and have it compared to the list of detected devices and activity for a match. The smart-sensor could then be moved and reused on different devices throughout the home to identify them one at a time.
The current process of quieting the home and turning stuff on one at a time to see what changes in the Sense UI still leaves some guessing in the process, particularly where several devices share a circuit.
A smart-sensor that captures the specific signature and timing of a single device would be a much more accurate way to start paring the pool of know but unidentified devices.