overall it is pretty good...ai is fast around the carousel and the fast corner after it...but that 'glitch' on the straight after t2 is still there...the AI abruptly swings right and left on the middle of the straight, right after the sign with the truck...hopefully it can be fixed. I was racing a full GT3 field when I noticed...not every car does it, but if there are 7-8 cars on that straight, 2 or three will. Also, the AI seems to often make mistakes at T5. They go out of track and come back very quickly hitting other AI cars...not sure this is the AI or aggression level though, it needs more testing..... Thanks!
Regarding turn 5: haven't noticed that, yet. I raced here with the Group C cars and the Indycars (URD) and it worked well. However, I'll keep an eye on turn 5 in the future and perhaps try to solve that. Thanks for your detailed review!