There are two primary reasons I see 200TW tires being useful to Improved Touring:

1) Category Distinction and Differentiation. What differentiates IT from other categories? Prep isn't massively different than LP Prod, and Touring is inching - leaping - its presence away from its Showroom Stock roots. IT tires are no different than Touring or Super Touring. IT doesn't have wings and splitters are limited. IT does not go to the org's biggest event of the year.

If asked to explain why run Improved Touring instead of any other class, what's your answer?

200TW tires would clearly differentiate the category in a significant way, something that is not done by any other category.

2) Attraction from other groups. There is a large and growing population of racers out there in series and with orgs that do not allow tires with a TW lower than 200. Limiting the class to 200 makes it attractive to them. Those orgs do that specifically for costs purposes. No one can legitimately argue that a $250 10-cycle tire can ever cost less, long- or short-term, than a $120 more-than-10-cycle tire. And while outliers can never be eliminated (really, you're going to shave your tires so low that they'll only last 2 sessions?) they can safely be ignored. Because outliers are not for whom we make decisions.

Improved Touring needs to make positive changes that will differentiate it from the existing crowd and make itself attractive to those not interested in chasing the Runoffs-of-the-Year. And this would be a really easy and cost-effective way to do it, one that would be quite easy to revert if it didn't work out.

And, really, 3) because those that actually want to spend the big money on consistently replacing fast tires probably don't really give a crap about Improved Touring anyway...

Food for thought.