I know its a WIP, so here's some thing I noticed that I have no idea how to fix: 1) There's a massive frame rate issue near the small houses next to the large suspension bride. 2) Some of the inclines and declines on the inner island trail seem to be too steep for vehicles without lifts AND major engine tuning. 3) I don't know if this is intentional but, there is close to no vegetation on the islands where there are no buildings. 4) This could just be me, but on some of the paved roadways a quarter of the road will have dirt particle effects even though the vehicle is clearly still on the road.
Other than that, I really like this map! It's fun to drive and is a little relaxing compared to some others, so don't let these problems intimidate/overwhelm you!