The ability to create complex rules that can be applied across multiple emails sent from various sources into one place! It would also help if you could add in other data fields such as date/time when an unsubscribe request was received or clicked within each individual message so it becomes even easier with this tool than before - I'm still not 100% sure what all filters are available but there's definitely some great ones out here already included which will make my life much simpler!! Great product overall & very well supported by their team too who have been extremely helpful at every step along our journey using them via chat / phone etc! Highly recommended!!