Yes, they did repave the entire track, and attempted to smooth out some of the bumps.

What looks different, is the amount of run-off between turns 6 and 8. They added about 50 feet of width from 6-7 and they added more gravel on both sides of the cork screw. The bridge that was over turn 9 is not more towards 8a, so from TV, it does look different.

Also, the entire media center and the look of Turn 1 is also totally different. Again, the actual track didn't change but everything around it has.