The hybrid approach failed miserably for us, but that could be the tool, it forced a lot of things through the GUI with no option to bypass. I noted elsewhere t

The hybrid approach failed miserably for us, but that could be the tool, it forced a lot of things through the GUI with no option to bypass. I noted elsewhere that diagrams are natural for civil engineering and notation is natural for logic and other branches of math. That is because of the "essential complexity". I think it is possible there will be a great general purpose programming diagram tool some day, but I've never seen one that wasn't either very domain specific, or downright terrible.