Currently it is pretty tedious to move a User Source from eDirectory to Active Directory or vice versa, even when the structure of both directories are almost equal:

You have to add a new User Source, duplicate all assignments to User Source objects in Administrators/Bundle Assignments/Policy Assignments (did I forget something?), delete the old User Source and then troubleshoot clients which do not want to move to the new realm.

This is a manual process for the greater part :-/
zman helps a little but definitely not enough.

We need a User Source wizard/assistant or at least improvements in zman to help us.