I saw a post about visual GUI editor and shader editor. They are all nice but missing one important visual editor, it's visual logic editor.
Right now there is no easy way to create cut-scenes without scripting, moreover, easy way to visualize what's going on in the scene setup. Scripts are all hidden from the scene and it's hard to navigate through the scripts to find connections between it.
Comparatively speaking, I think shaders are better designed by programmer but creating simple game logics or cut-scenes are better desigend by artists. But once we have game logic editor, similar interface can also be used for the shader editor and such.