He’s a great storyteller and a good-but-not-great writer. He excels in slow-burns with big payoffs. He hasn’t written any page-turners but the stories are very sturdy, well-considered, and rewarding.
His worlds are realistic in a sense because they aren’t full of whimsy and they’re not very inviting. But that’s what makes them feel real.
The characters aren’t 3 dimensional but they’re not flat either. I’d call them 2-dimensional in that they have flaws and a growth arc, but not a ton of complexity beyond that.
The dialogue and his ability to describe fights/battle tactics/magic physics are a place where he shines.
Personally, I probably won’t read any of his other books unless someone tells me he has written something entirely fresh and different than his other works. But I’m still very glad to have read a few of his works. They definitely set a new bar for creative magic systems. His magic systems are phenomenal.