It would be great if it worked like a node editor, where you could just drag the pieces around and they maintained their relation visually by connectors. It would also be great if you could toggle visible all link-connectors, because some of us don't rely on "Jump to the next slide" for our course design. Alas.
Have you explored the collapse/expand option (small black arrow next to the name)? I use that with CTRL+Wheel to scroll out and get an overview. Often i'll work by scene in that distant view, and then navigate slide to slide inside a scene for more detailed work.