Evan,

You're talking about a few different topics here. How to compete against other legal ITA cars and how to deal with possible illegal cars.

Let's assume all cars in ITA are legal. Before these changes begining last year, ITA was essentially spec Integra / CRX. Yawn.

adding weight to cars that have been there so long and taking silly amounts off of others seems like penalty time for people doing their homework.
What about the people who were there before the CRX / Integra misclassifications? How many RX7 and other cars were impacted? Weight being added to these two cars is a good thing! You can't honestly say that these two cars did not have a classification advantage. And it still one of the cars to have. From what I've talked with some of the very fast Integra drivers (with very well prepped cars), it won't hurt them much. Some were not even able to achieve the previous minimum weight.

Illegal cars. This is where I can understand your frustration assuming it is in fact true.