In the administration panel, "repository" means "VFS repository" which is equal to "Git repository". In the Asset repository, "repository" means "Maven repository" which is very different to "Git repository". All menu items and all labels should clearly state "VFS repository" or "Maven repository", never just "repository". PS: the usage of the term "M2 repository" is outdated because Maven 3 also uses it. It's better just to name it "Maven repository" instead (no one will expect to find a maven 1 repository any more).
QE considers this optional for 6.0.1.