The desired behavior I want is: if u click drag (without the need to select) it will move the node, as the OP want. Then, to create an edge, u should use a modifier key, lets say ctrl drag. I know the orthogonal edges will not be allowed in this way, but we dont need it at the stage of creating nodes: the customization of edges are usually done after we have some nodes, and we would still be able to do it simply dragging the edges as we do currently. Please add this. Best software EVER, thank you so much guys!