I got gold on Nurburg using default settings about four days ago. I didnt adjust the new sensitivity setting on the wheel either. Ultimately, I'd suggest it isnt the car. Its you. Its a beast to drive and thats the nature of it. I'd suggest you need to adjust the way YOU drive, not it.
I did, and achieved gold within one day. Also, go to youtube and look at stunes commentary on how to do it. Definitely helpful. Luck