It would be nice if Developer Studio had a perspective that let developers view existing workflow in a graphical, flowchart format. Similar to the previous Abydos Analyser product. This would be functionality that is not provided by Process Designer (which allows creation of new business processes, but does not help developers understand existing code-level workflow).
The flowcharts should be filterable by "execute on" values, as well as any other aspect of the workflow. It should have drill-down capability. Bascially, everything that Abydos Analyser had.