According to our development team via other Master Developer resources, this PII change was applied to the Payroll module for now, and may be applied to other files in the future. It is also set up so that Master Developers may make use of it as well. So this only applies for 2018 for Payroll. Other data modules can be copied for testing/report writing, etc. I guess this means you can grab all of the GLXXX, ARXXX, APXXX, etc. data directories out of the MAS_XXX directory as long as you don't move the PRXXX directory. This is what we understand as of today.