Through around chapter 60, TG:re is a solid 10 in every single aspect. It's beautiful with great characters and expands the world of Tokyo Ghoul while still keeping us tied to the themes and characters introduced in the first part. It's a masterpiece.
However, post chapter 60, little cracks start to show, and the issues in storytelling explode in the final arc, causing the story to cave in on itself. The main theme is truncated. The story relies on build up towards a thematic ending; however, all the build up goes nowhere in a clumsy rush towards an unsatisfying finish. Essentially, TG:re could be used in a creative writing class as a perfect example of what not to do in writing, and how to ruin a story's themes in a rush to end it.