It could be replacement for the standard "Workgroup" module as it has all the features of the standard module and more.
No, that's not true. It's lacking Internationalization, and multiple translations.
It would be handy is someone were to take some of the features added in the advanced workgroup contrib and prepared them as patches to add to the 7.0beta version of e-smith-samba. That would significantly add to the chances of anything being included.