Well, fuck. Looks like I won't be able to finish this game anytime soon. I've encountered a bug/performance issue that makes the game unplayable. I've been playing on all the highest settings for about 15 hours so far with no problems. Over several attempts at a play session today, the game's framerate shoots down to where everything is in slow motion. I tried playing on the lowest settings possible and it doesn't help. Looking into the issue on the official LoG forums it seems several people have encountered this issue and only after reaching a certain point in the game with some variations, with some people's graphics cards even overheating only when playing this game and there doesn't seem to be any kind of fix for it. I was really loving this game too but I refuse to go back to it until a patch fixes the issue.
EDIT 8/1/12: I'm an idiot, my graphics card was getting too hot because a loose cable had fallen into a cooling fan and was stopping it from blowing properly. I read several posts where people were getting massive slowdown in the same area as me and assumed the worst but since I fixed the issue with the cable blocking the fan my GPU temperature is back to normal and I am playing just fine again!