OK Jim, although the non bolded section makes for nice reading, let's concentrate on the bolded section shall we? Oh, and let's throw in some logic as well? First off, as you said, Kawari is for "all others." As you also state, its also for some non black based koi as well....you state the other "main family" as "non-metallic Ogons." So in fact, Kawari is NOT limited to black based koi at all and even some other black based koi have been moved out of Kawari into their own or other classifications over the years (goromo and goshiki come to mind along with the variances in Tanchos for that matter being moved out of their respective parent classes into their own). So, why is it not "logical" to move metallic versions of kumonryu out of Kawari and into a Hakari class? Afterall, metallic ogons do not compete in Kawari as their genetic cousins do? Personally, once the Doitsu class was "opened up," I think that Kumonryus should compete there...but that is just me talking.
The whole idea of "judging classifications" is to present like "types" of koi that have reasonable charachteristics in common for them to compete against one another. Now can a metallic koi be compared to a non metallic koi? One of the main charachteristics for Hakari classes is the "sheen". In Kawari, the comparisons between "types" (hakari and non hakari koi) would be useless, apples and oranges.
As the markets change and breeders develope (of just fail to cull) these new metallic "varieties," under ZNA benching standards, and even the suggested AKCA standards, the line is going to get duller and duller and perhaps consideration should be given to a Hakari Kawari class?
Steve