Very, very GREAT suggestion! It has frustrated me for YEARS that I can't see WHO has unsubscribed after a particular broadcast. Being able to not only do that, but to see the contact's entire history (including messages sent from Autoresponders), would be AWESOME.
I have asked for this over and over and over again, for at least a YEAR! I'm so sick of being told "the system times you out after 15 minutes of inactivity..." - the last time I checked (and this is true of every other online system I use!), typing was "activity" and certainly hitting the Return key is activity! 1SC needs to leave the stone age, stop making excuses, and FIX THIS BUG.
It should also include messages sent from Autoresponders! Those don't currently show up in the Sent Broadcast log, which is highly unfortunate - changing that would be a related improvement!