Following an upgrade SYSVIEW no longer sends output as to who issued a JES command to the SYSLOG.
The root reason for the SYSV0000 is related to the COMMAND-CONSOLE setting in the OPTIONS Parmlib member.
Either comment out the line or set it to ' ' to put things back to the way that it was previously.
Also, provided that you have created the AUDITLOG (the SYSVIEW AUDIT Logstream) these type of modifications should be logged by default.
The DEFAULT for Logging events can be found in the SYSVIEW Parmlib member CNM4BPRM(AUDITDEF) and the definitions are
JES_OUTPUT_MODIFY.
and
CONSOLE_COMMAND