A widget to assign and control multiple devices would be great. 

To use the 1x1 widget you need to set up a single device as its own scene. You can use the 3x1 for a single device, but that's overly large for screen real-estate. 

Having a single widget (4x1 or so) that you could assign multiple devices/plugs to would make daily use much more enjoyable while saving screen space. 

Thank you