I enjoyed the majority of it. The way the different chapters start in different years made me think that it could work well as a miniseries.
I thought the ending was a bit abrupt, though. Wasn't enough build up, and it was over a bit too quickly for it to be satisfying. I even had to reread a bit to make sure I hasn't missed anything. I hadn't, it just ended.
I'd give it a 7, I think. The expanded lore and the character perspective was good, as was the continued story of Dutch, but there was teased information implying a story which might have been better than the one told.