Hi Rod.
From what I understand, all these parameters correspond to image transformations that can be done as a second step afterwards. Am I wrong ?
If I'm right, I'm not sure this would be a good idea to add those extra parameters in the current filter, as they are not especially a part of the rodilius pipeline by itself, and worst, it means that modifying one of these parameters will require to re-compute all the rodilius effect (which is quite expensive in terms of computation time).
Basically, I'm not sure you want to wait 5 s. again, just to desaturate your image afterwards, or is it just me ?