The plot becomes more complex here as the author continues from where he left off in Words of Radiance. So far, I have a feeling the main storyline is yet to start.
Despite its brilliance, it would be totally unfair to judge other epic fantasy series using WoT as a yardstick. Here, I'd simply say, "other series have done well, but WoT surpasses them all''
There's almost as much fun to be had in the gradual discovery of the world of Roshar as there is in the numerable plot twists and thrilling events that permeate the entirety of the 1000-plus pages of this brilliant book.