I would like to see Designer offer me the ability to chain workflows together where once Workflow A completes, Workflow B will automatically start. There are times when linear processing is required in order to avoid dependency issues and/or for making it easier to organize complex processes. It would require outputting results to static files and it would take longer to process than the standard approach, but that is an expected trade-off. Offering a GUI drag-drop "orchestrator" to tell Designer the order of operation would be even better than having to manually open each workflow and tell it which workflow to kick off next.