It would be really nice if you could group certain lights together. This way you could control the brightness, hue, etc. of a whole room of lights at once instead of one at a times without having to set up scenes beforehand. We should be able to use one button slider to control several lights.
If we could allow the Button Slider for Brightness, Hue, and Saturation to control the properties of more than one light, it would solve this problem.