Yeah when I said online I didn't mean a website. Someone from production leaked it online by emailing the first draft to others. Gotham is not the only one who has the script and it is not a hard copy.
Don't worry about the daily rewrites part. Norton is totally focused in this project and was doing rewrites right to the beginning of filming. He and LL could have come up with a great idea and included it into the script. Everyday before a scene was filmed they probably sat down and thought if there was any other way of improving what they already had.
Don't worry about this film. It is in good hands.
For the better.
The First Draft had nothing about a car flying into a bus or any mention of burning buses. As Louis Leterrier said, the leaked first draft was six months old so they changed things and including a burning bus was one of them.