A national series won’t work on the west coast. The racers just won’t travel in the quantities needed to make it successful. I agree that a strong regional/club program has to be the basis for the future success of road racing.
Then you get the promotor who wants to run the one big race each year. It worked with the USKGP at VIR and Miller once or twice then it has to move on. COTA sounded to be the one in 2014. Not so sure now. Theres only room for one big race a year (maybe 2 if one is on each side of the country)