This issue was detected managing applications through the Embedded Console. An enterprise archive (.ear) can be successfully added and removed from the management console. When the .ear is DELETED, embedded console returns status:
Successfully deleted Enterprise Application (EAR) 'earname.ear'."

Using JMX to detect the status of the deployment for the .ear and its' subcomponents still shows the STATE == DEPLOYED.

Not sure if this is a goal for the 5.1.0.Beta1 release but opened for tracking.