We've had a few instances where the individual picking an order and an individual shipping an order differ. Sometimes the picker misses certain pieces that the shipper could catch. This would eliminate the need/cost to ship the missing pieces out later.
Similar to "Pack Mode", having the 'first' image of a product show up on the "Create Label" page could assist in catching these issues and/or providing a way for a shipper to double check that they've included everything in the shipment.
For orders with multiple items, multiple images could be displayed and/or a carousel could be utilized.