Renaming sub process
Avoid renaming all activities calling a reusable sub process
If you create a reusable sub process, you need to give it a name in the shape. Then you open the diagram of the sub process. You give the diagram the same name to easily find it back in the list of diagrams.
Then you reuse the sub process in other diagrams and you give it the same name and link it to the reusable sub process.
If you then rename the diagram where the sub process is drawn (business has come up with a better name), the links will continue to work, but you need to change the name on each diagram where the sub process is called.
For reusable sub processes, also rename the calling activities when renaming the diagram of the reusable sub process.