You can change something about the corners in the course editor. I went there and didn't see anything on the map, I guess you see it while racing.
I wish they would remove the car animation when you buy a new one (car), that "so you think you can dance" music annoys me, it shouldn't take 20-30 sec to buy a car, I should click on it, buy, click on another, buy and click on another, buy again, in less than 20 sec.
The game feels different too, I raced the Civic RM and the game felt faster in the cockpit view, but then again, I just started using that view not long ago.