My apologies, I will not appropriately reference the original source, I've seen a few people mention this around the web, but I cannot recall exactly where (not all were AP references).
I tried this on my Rosette.
Here's a 1:1 crop (80% quality JPG to meet forum rules but no resize) of before and after performing a Gaussian Blur in photoshop on the (a) and (b) channels in LAB color mode. No other changes between left and right.
I guess the goal would be to not have this noise to start with, but given limited data, noise is a reality. This really did a nice job of reducing it a bit. Or, at least I think so, but I've been staring at it for a while... so open to "fresh" eyes/inputs.