Jeff,
I see your point of view, but as a Mustang racer its the opposite. If I build a Mustang race car based on OEM technology from more than the last decade, I don't have a real SCCA option.
I mean unless I run ITO/ITE which last time had me racing against an SPO like car running 2:04's on the full course at VIR or World Challenge Corvettes and Vipers. An SCCA version of frankenclass.
At NASA I can race my Mustangs in enduros where in the SCCA I only occasionally get a class waiver to allow me to run an ECR.
I race where I am invited. I will run both ECR's at VIR in October and the Enduro at the ARRC. I will also run NASA enduros because I can.
If you don't like NASA or you don't want to race, that's ok. Its an 8 hour race at Road Atlanta. Its a new event that we have none of on the east coast that I know of. We have a couple of 12 hour races and a 24 at ledges, plus a bunch of 3 hour races. We have nothing beyond the ARRC 3 hour at Road Atlanta and nothing in the 8 hour range at all.
This is just an invitation. Just like any party invite, you don't have to use it.