Filter initiatives based on custom scorecard score

Portfolio management users want to filter by scorecard in reports and roadmaps to show and order the highest value strategic items and to find items that have not yet been scored.  
Right now, the individual scorecard items can be filtered and reported on, but not the total score for custom scorecard fields. You can filter on the featured scorecard field (added to competitor, features, and ideas) but not the custom scorecard fields like on Initiatives.