Hello,
I was looking for a quite robust function to convert tibble to matrix with handling of rownames. I created this script that I would enjoy in dplyr/tidyr libraries as user
https://gist.github.com/stemangiola/39b08d529157ce59a5ff5dc1653951c5
please let me know if it's of interest how can I proceed to make a pull request.
Bw.