The last specific question you asked me was "So are we also inserting an encyclopaedic knowledge of the Cessna product catalogue past and present into the licence syllabus?" I replied "I don't think you need an encyclopaedic knowledge of anything to tell the difference between a white Cessna and a red Piper.
The point of starting this thread was to canvas opinion, my personal primary point is that "Golf" does literally nothing, and yet everyone uses it. Unlike far too many in aviation, I'm very much open to changing my mind, and will always question why things are done. It comes with my job. Initially I thought "Skyhawk CD" might be useful (and it irrefutably is more useful than G-CD) but reading the responses of some experienced aviators on here I now think "white Cessna CD" is better. The funniest response so far was that we say Golf, and should continue to say Golf, because its a 'convention'.