I will ensure the knowledge-base article has the correct information - that's the basis for the devel ack. Making the solution not depend on cmirror package to configure is not included in the devel ack, as I don't consider it a problem to require the package for the purpose of configuration.
The knowledgebase does comment on the need for all LVM cluster packages and the need to start the daemons. https://access.redhat.com/kb/docs/DOC-3068