Ability to purge unsubscribes within date ranges.
I have over 10,000 contacts so eliminating unsubscribes to make things more managable would be a big plus. Unsubscribes end up getting counted in total sends and total contacts. It would be way to tedious to do them one by one from the email reporting section.
I mention within a date range as I like to export the full data base including unsubscribes and it is very useful in analyzing data as in leads from zillow and realtor.com and agents assigned to and price ranges.