Quick update: this really takes some time, but my fourth theme, Parchment, is finally approved and released at WordPress.org repository.
Also, to keep up Parchment, Opus and Cinnamon has been updated as well. Opus now reaches version 1.4.0 while Cinnamon reaches version 1.1.0. Materialist will be updated in days to come.
Now go update your theme! 😀