About bugs I can't say anything, but... The track that is build for F1 2001 is more accurate than the version we use, the model is really nicely driveable and enjoyable, it resembles the experience that you get from watching real onboards. The driving line is really nice. Our current version is just wrong. T1 exit is too open, T2 apex and turn out is totally off, the elevation, the geometry, everything; the descent into T3 is unreal, T3 exit is wrong, T4 entry is just totally different corner than in real track, elevation makes it invisible etc.
The straight T4-T5 is way to short, T6 and T7 are kinda ok, just the surface is weavy; T8 is unreal again, way too open exit and weird kerbs.
With the old ISI track it was much more real and driveable.
I say this all with probably 10000 and more laps done on the old ISI track in the past 10 years and with watching hours and hours of onboard in the past. Oh and I went to the race last year, I was there, I saw it live.