I ordered the book and I'm really looking forward to reading it!
But I just read some small excerpts of the script the OP posted and it just feels like it would have been a better movie had it stayed that way, as the OP said. But I'm sure Night had his reasons for changing it, he always has.
BTW, I seem to remember that the sequels, had they been completed, would have been called Unstoppable and Unbeatable. Can anyone confirm this or is it just bogus?