I've spent some good hours using ConsoleFX by Geraint Thomas. Being a sole gamepad and grip player, after testing your version for a bit it blew me away.
With consoleFX I was pretty much abusing the car's limits and the result was a severe understeer. It almost felt like cheating on some races as the autocorrection has prevented me from spinning out several times. You are pretty much on the path to nailing the experience for AC gamepad users.
IMO, there is still some room for improvement, like small refinements to the autocorrection system and the clutch could use the blip throttle feature by default. But all in all, this an outstanding mod!