Overall the team is working as documented, we continue to have bi-weekly meetings when it works out, all members are regularly active.
We are still in the RFC 166 implementation phase and have just announced that the almost completely treewide Nixpkgs reformat is going to happen soon: Nix formatting team: Treewide Nixpkgs formatting
As we make progress with the implementation, we are slowly moving towards a less active maintenance mode.