There's a few new conditions available in lists.
First are two new conditions related to workflows: "prior to" and "after step." You can use these to find anyone who has started a workflow but has not yet progressed to a certain point, or anyone who has made it past a certain point in a workflow.
Next is related to Registrations. There are new options to filter results down to attendee type. You could use this to find everyone who was a chaperone at camp, instead of the chaperones and the students.