from the sidelines, again
I'm working on 6 hours sleep, so take this for what its worth;
FE has the advantage of being a spec class. Your car will never get obsoleted by the DB-1 of FE cars. But, all the cars look the same, theres never anything new, and you have to pay Enterprize parts markups.
F1 has no limitations, all the cars are different, the smart developers and engineers all want to play. But, the cars are all obsolete in 1 year, or 1 race for some, You can't keep up, and you need the budget of a drug cartel to play.
We live in the grey zone; Obsolesence is always a risk. No matter how you write the rules, someone, sooner or later, will one-up what has been done before. It is the cost of progress, and if you want to avoid that, you move to a spec class. That is why they exist. Recognizing that, it's not surprizing that a car like the Radon has come along, and the reaction of those affected is hardly surprizing either. Again, it is part of the price of playing in a non-spec class.
To move forward from here is the challenge. A single car is unlikely to do major harm to the class. I know, everyone is jumping to point at my car, but the DB-1 didn't kill FF. The DB-1, Spec racer, and the explosion of alternative classes, together, did a lot of damage, but if you took out the SRF and other options, I think the DB-1 would have been a temporary set back. Either way, I don't see how you can retroactively outlaw a car that has been judged legal without running off every manufacturer who might be interested in your class, and discouraging competitors from buying new cars. I surely wouldn't buy a new car in a class where they might outlaw the car next year.
The best solution [IMHO] appears to be to have a committee of scrutineers, builders and knowledgable drivers come up with a set of rules that they feel will be best to serve and grow the class, then present those rules to the current participants of the class. If what Radon has done is judged bad for the class, outlaw it going forward, but grandfather in the cars currently ordered. It just seems to be the fair way of doing things. In the end, if the class is felt to unfairly treat builders and buyers, it will hurt the class. Certainly the carping on this thread isn't doing the class a lot of good, and it isn't solving the problem.
As a disclaimer, I've talked to Doug and Steve, who both have freely given me advice, and I like them. I have never actually met either of them, and I have never even talked to Nathan. If I have a bias, it would not be towards the Radon team, as I don't know them. So hopefully, this is an unbiased view. Take it for what it is worth.