Now that I've put some decent soldiers into havens, I've been getting a ton of faceless rezendvous missions and the wilderness/ruined building maps are starting to get a little repetitive. There should be some options for the meeting to take place in a seedy laundromat at the edge of a slum or a busy bistro in a nearby Advent haven to add some variety.
You could even tack on a few variations to the mission based on its nature. For example, the haven cafe meetup might have some reinforcements rather than a second pod and might have a hackable computer with the advent handler's other faceless contacts.