You noticed substantially increased CPU consumption after your hardware upgrade to an IBM z/13.
CA VISION:Report R16.1 running on an IBM z13 mainframe.
Some CA VISION: Report load modules had internal subroutine calls to subroutines with saveareas adjacent to the executable code. This programming technique is no longer supported by IBM mainframes.
Download APAR RO88567 from CA Support Online.
There are special installation instructions in the APAR.
CPU consumption rose about 30 percent in one case.