It would be super nice if you could save search overrides on a dashboard. For example you could have one dashboard and 3 saved searches, one for the source production one for dev and one for testing. This would keep you from having to save each one of those as there own dashboard.
The problem with three dashboards is that if they all need to be the same and you modify one you then need to go threw and delete the other two and re-save them to update them.