can't view more than one of workflow editor, report designer, and report viewer at a time
It's a little frustrating to have to constantly find that little menu in the upper right hand corner and flip between the workflow editor, report designer, and report viewer, especially when I have more than enough screen real estate. If I open a composite actor, I get a new window. Maybe the report designer and viewer could open in similar new windows? It might also help resolve the problem of there being different "reports" for a workflow and for its composite actors.
I'm thinking of report designer and report viewer buttons. They each bring the appropriate window for that workflow into focus, opening/creating it if necessary. That's just my own thought, and any way to view things side by side should help.