Cost savings? Where? You have just suggested opening up wheel sizes. I and and a bunch of the smaller tire guys will need to buy new final drives or new cars.
we will shave the hell out of these tires negating the per unit savings.
we won’t attract many, if any at all, cars from the other groups.

And as icing on the cake, you have completely upset the competitive balance in ITB and probably ITA. Lower torque, better handling cars will be screwed because the fatter, higher torque cars probably won’t be hurt as much. Think I’m wrong about that? We’ll have ya done any thinking about it at all?

needs of the many over the needs of the few? Sounds more like the needs of ITS drivers over the rest of the category.

Before you make a change of this magnitude, I suggest you create a 200TW region class and see how many of your predictions, particularly cross-overs happen. Not bracket, but ITR200, ITS200, ITA200.