A potentially minor improvement along these lines could be a very nice feature enhancement for OpenLDAP. Thank you for your consideration.
You're talking about two things: a) slapmodify, which is slated for release with OpenLDAP 2.5, which allows offline modifications of cn=config, and b) delete support in cn=config, also slated for release with OpenLDAP 2.5.
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>