That would not help him I think :- ). Unless he was interested in heavy masking every specle/firefly.
I had thought to myself same request. In practice it comes out that you basically always want 100perc. specles reduction, but only sub <100 noise reduction, for example 50perc.
Currently you have to choose between two incomplete scenarios:
A) Specle reduction only. Will remove specles but not noise.
B) Specles + Noise. Will remove both...but in proportional scale. So 0.5 will reduce noise by 50perc. and specles by 50perc.