I propose that DxO add a function that allows to save a reference image or preset that eliminates dead and hot pixels as well as dust. The reference could be taken from a layer of dust correction positions That have been created manually or by some kind of voodoo.
I suggest that Photolab compares pictures in a set to detect dust by correlation, where dust is the signal to be found and the actual image is considered as noise. This process could find the noise without a reference image.
This would be followed by batch cleaning of the whole set.
EDIT: This is now a suggestion by itself.