It's a great circuit and I used to race your older version frequently (just for the last couple of turns into the straights - I love taking them at full throttle and drifting around them). With this newer version, the improvements you've mentioned have definitely improved those features, but there are still a couple of things that I would like to see improved. The crowds are one thing - the mixture of square 3D people and flat photographs of people mixed in together looks hideous. Could the 3D people be removed? I also noticed that as you drive up the hill, with clear weather, the track almost glows white (though it looks fine in replays).
If these two (admittedly) small things could be improved upon, then it'd be a great track and worthy of five stars.