I've read the books as well and saw the first 4 episodes, like at this point why bother with it, they'll change the road but the destination is the same, just take it as it is, personally condensing the story to fit the main characters is the best, they only have 10 hours to a book. Plus now that I read it all, The new scenes will be a pleseant surprise. Just take it as it is.
Apparently all the screeners that were sent out were marked, so unless the leaker covered his tracks and removed the watermark, he/she is screwed. GET HA HBO!!