With CICS/TS v3.1 it is possible to set up duplicated APPLID for each CICS/TS v3.1 region in a SYSPLEX environment.
However, this is no longer possible with CICS/TS v5.2, so unique APPLID for each CICS region should be used.
Does this affect OPS/MVS functionality?
OPS/MVS doesn't depend on CICS/TS version, APPLID and CICS region name.
However, it is better to check if any of those changed APPLIDs and CICS Region names are referenced in the OPS Rules or Rexx implemented .