My organization has decided to use tasks in lieu of projects in many cases to allow for dependencies. Many of our "projects" are a part of larger projects or events, so tasks make things easier to organize and recreate. That being said, with all the extra parent task, some "Active" to-do lists had been getting overloaded with unnecessary fluff. To remedy this, I created a number of "Deferred" status to clean up the dashboards (example pictured).
If a fifth status group (with similar properties as the "Active" group) is added, that would alleviate a large number of our problems with clutter and reduce widget setup time. In the "Misc" status group, we could put our parent task statuses, event statuses and Meeting Notes/Reference Material statuses.