The work to require verified group names on Clojars has been released. See https://groups.google.com/g/clojure/c/cWG-V_4uv90/m/EDx0Fqn_AgAJ for more details.

I've not had any feedback from the Boot folks, but Leiningen released 2.9.6 a few days ago so it will look for templates (and create new templates) the same way that clj-new does, to help support VGNs: https://github.com/technomancy/leiningen/releases/tag/2.9.6