This would be usefull because there would be no need to change the records in the Connections Databases directly for existing users. By changing the Preference values in "notification-config.xml", you are changing the default values for the new users, it has no impact on existing users. Sure it is possible to set the settings to "locked" but than the User can not change them.
A one time WSADMIN Command would be great and save some time to change the notification settings for all users.
Take a look at the following URL for the information how this needs to be done at this time: