Please could we have a checkbox in the main LightMix element to denoise 'Rest (unassigned)'
Currently any light not assigned a LightMix element will fall into the 'Rest (unassigned)' category and will not receive any denoising.
Besides making sure you have denoising applied to everything, it would also mean that any self illuminated materials also get denoising. At the moment you cannot add a self illuminated material to LightMix (separate request!).