In fact the design is pure genius in its simplicity and clarity, if you thought it up I salute you, if you blagged it from somewhere else many thanks for sharing it.
I readily admit it wasn't my idea - it was one of my students. I'd been going through the Morse code with him and noticed he was writing it down in an unusual manner - a crude flow chart. When I asked him about it he just said "It seemed more logical this way."
We tidied up the format a bit and used to give it out to all club members going through the IMC Rating - and a few others too. I've seen other copies around so I am sure others have hit upon this method too.
I still use the chart as my Morse is getting worse with time - a combination of age and lack of frequent use. Like the old adage of "read from ground to map and not from map to ground" I prefer to decode what I hear rather than try to make the code fit what I see on the chart.