> My coworker has an old version of cas management doing exactly what I described. Did functionality just get dropped?
You could say that, yes, though this is not a rewrite.
> If you can't configure it, how exactly do you use it with anything other than the default user? The default user the log output warns that you shouldn't use in production.
You only use it with the default admin user.
> Can non-integrated versions of CAS Management be used to configure services on 7.x instances of CAS?
Should be possible, yes, though the repo is going to go away fairly soon.