Deployments of -ds.xml file must be deprecated in EAP 6.4.0.
https://github.com/jbossas/jboss-eap/pull/2271
Created Bug 1188379 for the quickstarts. Created Bug 1188404 for the documentation.
Follow-up PR https://github.com/jbossas/jboss-eap/pull/2279
verified on EAP 6.4.0.ER2 deploy -ds.xml => WARN deploy app with -ds.xml => WARN deploy app without -ds.xml => no WARN
John Doyle <jdoyle> updated the status of jira EAP6-345 to Closed