I'm designing the new flowgraph editor now. This is what I've got:
It's using the windowed GUI, not a 3D viewport, and I think this will give it a better appearance. I plan for the entity to display each component it has, with the input and output functions for each component. I want a slider to scale / zoom the interface, and some way to add, edit, and select multiple "pages" (which are separate flowgraphs within the same scene, but not connected to each other).
I don't know what the UI for this should look like. Ideas?