I felt the quality of the book slip about 2/3s of the way through. Description and language faltered as the action and pace picked up. I can see an author altering their tone to help project aspects of the plot, but this felt more like 'gotta get done, gotta get done'.
GGK, throughout the book, managed to touch any number of little introspections for me, especially through Devin. The character poetically raged over their own personal dramas and thoughts, adding books within books for me. I can try to dig up examples later. It was these initial traits of GGK that really drew me into the story. With the end of the story (and the epilogue) I didn't see any personal resolution to these characters struggles. Mind you, I don't think all a character needs to answer everything to draw a fitting end to their tale, but the depth and echoes of hearts and minds seemed silenced as each character left us.
On the other hand, having read the afterword, I'm more appreciative of some aspects of the ending. The photograph(s) GGK references shows that Brandin did not totally succeed or fail in his endeavors, that sometimes silence can solve the very problems action itself fails to provide. That was a nice touch.
There were always shades of gray, some that ultimately turned toward white, some toward black. The binding of the wizard was an interesting one, a parallel to Dianora. Fitting that this parallel brought two different results to the characters themselves.
I could go on and on, but I'll save it for another discussion, or revive this thread later with my biggest complaint. Rating? 8. Strong theme worthy of dissection. Characters with great motivations and touches. Concludes with more simplicity (and magic) than necessary.