If IT gets removed from the GCR, and all the various regions make their own adjustments to IT so that the rules set is not the same around the country, then the class is doomed in the SCCA. If it isn't already irrelevant now that will absolutely make it so.

It might be more productive for the interested parties to discuss a new "IT-like" class, with changes to the rules that modernize the class, and shop it around to other sanctioning bodies.