We have now released v0.2 of this tool, and published it here: Release v0.2.0 · cytechmobile/radicle-github-migrate · GitHub
This release now provides all the above functionality, so we think this tool is now ready for production use for teams who want to move their GitHub issues to radicle.
The Radicle Jetbrains IDE plugin team will be the first team who will be trying out this tool, over the next couple of weeks, as part of their plans to migrate the plugin development from GitHub → Radicle.