@Florian_May We do want to add some sort of Central to Collect sync that would include forms, submissions, and settings. See What's coming in Central for more.
It's a bummer that the R-package and LibreOffice don't work. I've filed an issue at https://github.com/opendatakit/central/issues/72 so we don't forget to look into it. If you know why R/LibreOffice are failing, please comment on the issue!