Just an idea for future (P4 for now). Read above mentioned blog post and you will find that it could be useful if code completion listed all classes annotated with @Alternative in following beans.xml file ('|' is editor caret):
Implement code completion of the fully qualified name for all classes in persistence.xml and beans.xml in general. Not only @Alternatives but also @Stereotypes and code completion for interceptors should be supported.
I would support the expansion of FQN in all xml files.
*** This bug has been marked as a duplicate of bug 229795 ***