The Neo4j GraphQL Library 2.0.0 release introduces several new features, including support for relationship properties, cursor-based pagination, and count queries. Relationship properties allow storing information on relationships between nodes in a graph, addressing the need to avoid creating unnecessary data with extra nodes and relationships. The library also improves the developer experience with union relationship fields, more comprehensive validation of type definitions, and internal refactoring and bug fixes. Additionally, the release introduces Relay-style pagination, allowing for filtering, sorting, and paginating on connection fields using cursor-based pagination. Count queries have also been added to compute the total number of pages in a query. The library has undergone extensive backlog grooming to fix many bugs reported by the community, making it easier for users to migrate or use the library with existing issues.