Ability to view the relationships for a given modeled element, to any other modeled element (association, includes, depends, etc.) in a table format. Possibly in the properties of the element.
An optional more advanced ability would be to create an analysis/traceability diagram, where you can drop a modeled element into the diagram, then choose which elements related to it in any way are automatically added to the diagram. e.g. Show me all use cases that include this use case, or show me all use cases that are associated with this actor