I'm John and me and my co-creator Mike have built an automated GitHub Issue assignment service called Heupr. It helps very active repositories like yours (with 600+ open issues and 100+ contributors) coordinate software maintenance and feature creation.
We reached out to Juan and Victor, who actually raised this point before, and they recommended that we reach out to the community to get your input about using our platform to help your development.
We're actively looking to help more projects improve how they coordinate bug fixes and develop new features. We'd love to help and get your feedback!