I think this a great idea, and I agree that it belongs in the core standard.
During the Nepal Earthquake, the consolidated 3W was coming out every 3 days at first, then weekly. It's harder to do better than every 3 days if the report involves consolidating data from multiple activities at some central location, because work on data generally happens only in the evenings (responders are out working or meeting during the day).
In a future where operations on the ground report directly and automatically (rather than via their cluster leads, country teams, etc.), I could see daily becoming a possibility.