With use-jaxws=true the following logging should cover WS connector configuration, inbound/outbound request and response as well as serialization.
*=info: WLE.wle_outbnd_ws=all: WLE.wle_inbnd_ws=all: com.ibm.bpm.ws.jaxws.*=all
*=info: WLE.wle_outbnd_ws=all: WLE.wle_inbnd_ws=all: com.ibm.bpm.ws.jaxws.*=all