The ability to look up or search for the Lists a specific record is on would be helpful for me as I merge duplicates to ensure if the two records were on different Lists used by Staff that when the records are merged that the remaining individual constituent record is included in all the Lists they need to be.
It would also be useful if someone is on multiple email lists and asks to only receive emails from a specific department List. Currently we just have to know what Lists they may be on or do a search in all the potential Lists.