Note that #2580315 renamed the long version of the export command from config-devel-export-module to config-devel-export however the aliases were maintained.
The module has been rewritten from ground up with new feature and focus. There's a start for being a features replacement or part of one as well. There are tests. Please file bug reports!
New feature - check each configuration read from the active store against the config_devel yml files, and write back to the active store if there are differences.