Good review. Only thing I would add regarding dilution ratios is that some compensation for heavy water may be helpful. Since some of the product's polymers can become preoccupied by adhering to minerals in the water, a bit stronger mixture is a little safer and can offer better performance, IME.
Personally, when I do a rinseless wash (ONR or BFRW) I use a 1.5 ounces per 2.5 gallons mixture, which in total is slightly stronger than recommended. Seems to increase lubricity when washing and slickness when drying. I make 2.5 gallons because it gives me plenty of wash to do the job and leaves a bit left over to do the wheels. I once tried using 2 ounces of product, but the mixture seemed too strong and I didn't like how it worked..IIRC, it was more difficult drying and clearing out the finish (i.e., it streaked a bit).