Powermail results should show CHANGES in Subscriptions as well as UNSUBSCRIBED to all subscriptions

Currently the results and issues summary page of powermail only reflect an "unsubscribe" if the individual has unsubscribed from ALL publications.  It would be helpful if this data reflected both those who change their subscriptions such as unsubscribing  from  just one of several publications as well as those who unsubscribed from ALL publications.  It also would be helpful to know, in the individual's contact record, what exactly they unsubscribed or subscribed to.

Thanks.