Like circulation rules, the new MARC overlay rules have a hierarchy of specificity and will enforce the most specific rule applicable. With that in mind, it would be helpful to have the option to sort the list of rules on marc-overlay-rules.pl to reflect that specificity and enforcement priority, as we do the circ rules. That specificity is defined in the documentation here: https://gitlab.com/gnucifer/koha-manual/-/commit/eb07dd1abcb357de27d294cee49c287c6f5bfe6c