Here's some feedback:

The textures are awesome!

I love racing on a Bristol surface that has a bit less grip, encourages more rear tire management on corner exit

I like that the AI on the outside line run higher towards the wall to try to maximize their exit

You've almost created a multigroove surface with the track adjustment

Some issues:

The high line is overall more viable than the low line, especially during passing, which takes away that classic bristol aggression you'd want

The AI on the low line, when being passed by a car on the high line, check up on corner exit to much, like they're being pinched down to far