Sorry @paperdigits, I didn’t understood that you were in the team. Beg your pardon.
Your list is very precious to me (point 1, 8, 5 are done; 3 and 4 are in my plan but need some hard training before; point 2 and 6 will come while working; step 7… sorry I0m not able to do it )
Gianni, there is a separate branch of Rawtherapee which supports local adjustments. If you search the forum for LOCALLAB you’ll find masses of stuff and how to build/download.