I agree on the color and that technically it can't hurt but I would love to see a Side by Side comparison for flavor.
I know one benefit, with Fatty Meats like Coppa Cure #1/2 helps keep the Fat from going Rancid. However, I have to think that with Whole Muscle, if Cure was a great advantage or necessary, the Salt only guys would have adopted it's use in last few decades...JJ