JAXRPC and JAXWS deployments need to be associated with different classloaders at runtime. This is basically because endpoint implementations (and handlers, etc.) need to be able to correctly use features/functionalities that requires factories' resolution through the JBossWS SPI ServiceLoader and/or classloader's resource loading in general.
This means that the whole deployment unit have to be associated with a classloader that correctly sees the stuff in the jaxrpc deployer folder first for jaxrpc deployments (the same applies for jaxws deployer and deployments).
Currently the classloader built at deployment time for a given ws deployment unit points to the deployment archive. References to classes/resources outside of the deployment are resolved through the BaseClassLoader that "sees" the whole server structure all together, including the deployers folders. This is of course a problem here.

An idea is to provide additional libraries with the META-INF/services/.. stuff only. The CXF/Metro ones should be installed in common/lib, while another one for jaxrpc/native should be included in the jbossws-jaxrpc.deployer. The latter has to be used by a describe stage deployer for adding additional classpath entries to the deployment unit before the classload phase for jaxrpc endpoint deployments.