In the Team VVV video
@VVV Mars VG claims the traction control has changed. Watching his video it is quite evident that TC does not bog you down like before. I found it interesting he was able to spin on TC 4. It also looks like TC activates based on tire slip now, while in GTS it seemed to be activated by steering angle.
TC has never been modeled correctly in Gran Turismo. I hope that my interpretation of the Team VVV video turns out to be correct. Gr. 3 racing would be much more enjoyable with a tad of TC just like in Assetto Corsa Competizione. In ACC turning off TC makes you slower (and destroys your tires) and since TC is correctly implemented in that game, it allows you to find the perfect balance between the car, speed and your driving style, as it should be. This has never been possible in GT because the way TC works is wrong.
Really hoping that someone who owns the game and is interested in this topic jumps in the thread with some observations. If not, oh well, only a couple more days to try it myself.