Was pretty dissapointed with Forza 5 tbh :( the cut the tracks in half and had a major cut to the cars from 4. and removing car clubs, Auction house also kinda killed the game for me. Don't have any drive to push for top 10 times in any class.
another thing that that link doesn't go into is changing the trigger deadzone settings so you can widen or reduce how far you have to press the triggers or steering before the game registers your doing it. I usually drive with all assists off and ocasionally use TSC for stuff like the F1 car. I also run 135% brake pressure with ABS turned off and my diff is usually 65% accel and 5% decel