I agree its getting there. I can now do some single player Altis missions without a problem. (have not even attempted Altis MP yet)
I do still get the 0 fps issue though. it comes from nowhere.
I could wonder round the main airport for half hour. Go to a spot where i've already been and looked in the same direction and bam. unrecoverable even after going back to main menu. Seems totally random to me on where and when it happens.