Well yeah NFS is pure arcade nonsense but there is one that just might save himself the NFS Porsche Unleashed ... i liked that one it seemed at least a bit accurate .... except for the police cars and hey before that one i was playing viper racing and now i'm addicted to LFS
The long tunnel sounds really nice, wide, with some bends that would make it very appealing visually i guess.
In my oppinion, now LFS could use a few long tracks like nordschleife/nurburgring. That would make things interesting ... even a 5 lap race would be very unpredictable and would keep people driving for a long time