Often times in fantasy novels the last 10% or so of the book will be the big final battle scene. Well in this case since this was book #14 they were able to dedicate a large portion of the 900 pages to a non-stop battle scene. Normally that would just seem crazy, but having built the characters and the world so completely already it actually worked. If anything I think there could have been more. It did end up feeling very different from the previous books, but I think that is fair. Of course if this would have moved at the pace of the previous books it would have taken another 14 books to finish.
Just looked up Hinderstap to figure out the trick Mat pulled. Hm, I wonder how many other references to the previous books that I missed.