Very good start !
I did this road back in 2019 on motorbike !
Here is a list of the improvements :
- Road seems more rough than IRL
- Hairpin turns are especially the rougher
- Missing the white lines on the road
- Missing the Flüelapass sign in the middle, near the lake (that you made, I recognized the blueish color :D )
- Even if I drove in this direction, a reverse track could be also enjoyable
In short, it brings back memories of the real deal, kudos to you !
In case you're looking for other passes, may I suggest : Grimsel, Susten, Umbrail.
Greetings from Switzerland !