This has probably been requested before, but it would be so great if there were an option to 'De-noise Unassigned Lightmix' lights. All too often I only care about Lightmixing one or two lights. So then I have to assign the other lights to a lightmix object, and if one slips by (or I add another light and forget to assign it) I end up with noise that isn't de-noised at the end of the render, leaving me to hunt for the last unassigned light.
Thanks!
Dan