It would be great if Explorer offline maps could be created from a feature service with sync enabled. When data has been updated users could download the updated map similar to the Collector offline sync function. The GIS Analyst would not be required to create a new map package and webmap each time map data is updated.
This idea has been marked as a duplicate of Provide disconnected functionality to ArcGIS or Explorer for ArcGIS mobile apps by Scott Prindle. Please consider voting for this idea and commenting to share your perspective.