You might suggest to future hosts that they have a list of check-out expectations for guests. You could put it in the private feedback. We have one in our "House Manual. It has basics like where to leave the keys, the towels (bathroom floor, which is heated tile and will dry them if I don't get there right away), etc. Top of my list is to please check under beds, sofa, and other furniture for items, and remember their phone chargers. This has cut down the amount of stuff I need to return to guestss.
While I certainly appreciate them starting the laundry, sweeping up, and sorting trash/recycles into appropriate bins, I don't require it, because it doesn't really save me any work--in fact, we specifically tell them that if they have any doubt about how to seperate trash and recycles they should just leave it for us. So much easier than diving into large trash bins to sort it after they leave!