I only have one suggestion.
Keep
It
Simple
Stupid
Nothing RCPro does is simple. If you want it to work, don't over complicate the class right off the bat. You immediately turn off new racers if the rule list is longer than your arm, and it should never be a class aimed at "pro" or open level racers. That's what sedan and 1/8th are for.
Geesh. And we wonder why kids would rather sit down with Gran Turismo 5 and a Playstation over an R/C race car.