So I’ve tested a little the new contrast treshold and I think it’s very useful!
I’m a big fan of the old unsharp mask and for what I can say the rawtherapee unsharp mask is “optimized” for a radius less than 1 pixel.
In the end I find these settings a little better:
Contrast treshold=1 (yes only 1!!)
Radius=0.5
Top and bottom left treshold=0
Top and bottom right treshold=2000
For the RL deconvolution contrast treshold= 20 is pretty good.