Zermatt I completely agree that its non needed. I am in the stages of testing for a ptg gt series very similar to this one. I havent tried testing with tcs yet, but i actually think due to the intrusive nature of tcs on forza 6 it will actually make these cars slower. So far i have tested all the gt cars in stock form, some were difficult to drive but after a few laps i could get the hang of them. Then i have added a build to level the playing field and the cars are very grippy and very drivable. Some of the mid engine cars have an odd balance and are a little slippery, but like i said this is no tune just a build. I can easily get rid of that stuff through tuning.
That said people can run whatever they like