I think that's a matter of opinion, personally. To me, Revelation and Dust
is still the weakest. Half the plot had nothing to do with The Fall
. Its hard to come back from that.
I don't think this book is bad, or badly written. I enjoyed reading it well enough. But because it is the final entry of the series, it is going to hold the weight of any criticisms about The Fall
in general. [For which there are quite a few.]