from what I understand, there's a slight controversy over him designing the course...apparently people don't like his designs...
All the drivers pretty much hate his designs as there is little overtaking, look at the debacle of Bahrain to understand their sentiment. Pit exit sucks the first year around as well as a couple of turns, had to go in and change it before this years first race. Look at the pit entrance of Atlanta Motorsports Park and you will see what I mean.