Work on more single make spec classes . In the field's I am seeing, 60% of the IT cars are Spec/ITA Miata's. Like it or not IT is already a majority spec series. Accept that the future is more spec racing and not class racing. Go to Spec 944, BMW 3 series, Honda. We are approaching the end of times where there are cheap plentiful varied new cars that are very good (other than Miata's) coming into IT. Most cars are too heavy, and heck, many are ending supply of manual transmissions. Also they are just getting tough to develop into reliable, good working race cars. Rather than pit the Honda Vtecs vs BMW 3 series vs 944's leaving everybody unhappy, make them race within their own spec for their own trophies. I am not arguing about eliminating the present classes, Just add new ones using NASA templates try to grow IT fields.
I have been around to see VW rabbits, Dondge Chargers, Dodge Neon's, and CRX's be the next hot thing in IT and then wane. Someday this will also happen to Miata's. If it does and the IT committee hasn't found a next act, I don't see how IT will continue.