A rules freeze is a good idea. The listing of changes this year looked minor. We have a horsepower cap, a focus on stock parts and a minimum weight so the rules do address the economics of racing. The rules have focused improvement on the drivers ability. For these reasons I would vote to freeze the rules for at least two years.
My only suggested change is to require wink mirrors and rear view mirrors on the fenders for safety and better visibility. These mirrors would greatly reduce to eliminate the blind spot issue that occurs when a car is at the rear fender of someone.