An "upper stilt" and a "lower stilt" that points the OPPOSITE direction of the current configuration should be added.
Also, some kind of line that I can determine how it goes, i.e., the ability to manipulate a line in any and all directions.
Also, the diagrammer should have the ability to UNDERLINE a single word within a group of words.
As to left and right "conjunctions" (aka rockets) one should be able to use these WITHOUT the vertical line.
Please add more color choices.
Thank you