I have some overgrowth objects problems - I used palm trees from jungle_test folder, which look great (what you can see on my previous screenshot), but they have problem with disappearing trunks earlier than the palm's leaves at the edge of the view distance. So in the distance you have weird floating palm leaves in the air. Also there's similar problem with bamboo OG objects, which also become "sticks" at the edge of view distance...
Also I have some problems with ported statics from FH1 - houses have for example not "walkable" stairs or there's long wooden bridge under which you can't swim with a boat, because it has some weird invisible wall under it...