First let me explain:
I think you are doing awesome work, and this track so quickly after the revelation of the new track is great. Barely saw any track shaping up this fast.
My 3 stars are completely a "current status" judging, which is given the short time very very good.
So the reason i gave only 3 stars are:
1. road mesh..you barely notice any transition between the different turfs - worth 1 star
2. what really bugs me is the stop (wrong direction) sign. I can't really drive/race that track, because the stop sign annoys me too much. - will give 5 stars if this can be sorted.
Because otherwise it's an awesome track. I hope other people, and the author are understanding the perspective of my 3 stars.
Keep up the great work
Also you can download the wrong way fix here
http://www.racedepartment.com/downloads/the-grand-tour-wrong-way-fix.12924/