Ability to rank product line backlog in a list view Merged

Aha scores and rankings are great tools to rank within a product. However, product line managers and directors like to see entire backlog across the products and list them prioritized order. We have created custom fields to show this rank, but its drastic manual effort to place every item in right place across 300+ item strong backlog. 

If there was way of drag/drop ranking items within a list view, it would be awesome one.