Glad you enjoyed this volume! As I said before, it is one of if not my favorite book in the series. The ending, whole somewhat sudden as you pointed out, is definitely my favorite of the series. The writing in the Dumai's Wells scene is simply amazing. This book also starts to set up the rest of the series, which I find interesting.
As I have said before, I view the Wheel of Time as a sort of trilogy/tetralogy. As I'm sure many of us know, it was originally intended as a trilogy. Based on the structure of the story, I am fairly certain that the end of book 3, book 6, and book 14 were the original endings of each of the intended three books. (As a not-really-spoilery aside, I get the tetralogy idea from book 9, which is enough of a turning point that it could be considered a significant break, leaving 1-3, 5-6, 7-9, and 10-14 (really only three books as well) as distinct narrative sections; however, because of how muddied the story gets in those later volumes and as the series was intended as a trilogy, 1-3, 5-6, and 7-14 work best when considering sections of the series.)
Wow. That got a bit long-winded. My point is that LoC serves as a big turning point in the series, and I can see in the OP that you caught in on a lot of the set-up of later books.
Hope you continue to enjoy the series! The next 5 books (though mostly in books 8-10) are where the series really slows down, but, reading them in a short time period as you are, you should be able to enjoy the huge amount of character development that goes on from here on out. I read the books in much the same way you did, excluding the last one, and I actually quite like the later books (yes, even Crossroads!).