Almost scared to answer this one as it generally doesn't end well.
When I made my decision to move away from IT, ST wasn't around. My car was originally an SSC car, that was too old to race SS. I started an IT conversion, did an SCCA drivers school, raced a few races. I realized that my car wasn't legal due to some modifications allowed in SS, that weren't allowed in IT so I decided to race with NASA instead of undoing what seemed to work so well. Their PT rules allowed my specific mod and seemed to have less washer bottle type rules, and washer bottle type people.
Sure, it's not perfect, but the group I race with are good folks, who play well together, and seem to have more fun.
At least from my seat, IT seems to have a car d'jour that IS the car to have if you want to win. In PT, just about any car can win, it's all in what you do with the blank canvas you start with.
I still support SCCA as a worker, so I still see the politics in action (and am sometimes a victim of it). The NASA group I race with seems to have less if it from my perspective.
YMMV