It's a whole lot better for some of us after patching it up. Not all issues ARE game issues. Sometimes a lot has to do with one's system.
Well, with the latest patch I didn't have one crash and I have finished the game. So it's possibly down to certain system configurations and not always the game.
Overall though a superb game and I'll look forward to entering the Zone again. Favourite area was The Red Forest, it looked incredible with the sun out and the sun rays shining through the branches. The bloodsucker were terrifying too.