I have added a few features to the IMS Enterprise enrol plugin for Moodle v2.2.x
Ability to update a course Full Name
Ability to create nested categories during course creation
Ability to update a user record (all fields that the plugin already knew about except username)
Ability to set/update an authentication type for a user (during creation and updates)
Please see http://tracker.moodle.org/browse/MDL-31356 for patch files if you are interested.