Use of REPROMC to clone master catalogs

We regularly make use of REPROMC to clone master catalogs - copying entries from a live master catalog into an inactive empty target.

Typical job as follows:
//STEP15 EXEC PGM=CSLMAIN
//STEPLIB DD DSN=SYSMECH.LOADLIB,DISP=SHR
//SYSPRINT DD SYSOUT=*
//SYSIN DD *
REPROMC ALL,
INCCAT=SYSCAT.PLEXS1.MASTER4,
TARGETCAT=SYSCAT.PLEXS1.MASTER3,
NOMERGE,NOVVDSUPDT,NOENQ,
EXCDSN=SYS1.ZFS.**,
EXCDSN=SYSIBM.RDZ.**
/*

We have used this technique for some years; however in light of a recent catalog hang incident, we are now a bit wary of using this. The REPROMC in that incident was only copying individual entries, but was targetting an active master catalog.

This "catalog clone" scenario is different in that we are targeting an empty, inactive catalog, although I understand the active source catalog (and its VVDS?) still need to be exclusively enqueued.

I guess it goes without saying that this should be run at a quiet time, but I would be interested in any views on: -
- Whether this is a valid method to use for cloning master catalogs
- Whether it's a safe method?
- Is there a better way?

Any views or tips appreciated.

Cheers
Martin Arnold