DFC - I like your theme. Infact I particularly like the promotion of a practice pan type call with the LARS freq. in use. Much more likely to be practical in the real event.
I still feel that by the instructor pretending to be the D&D so as a practice call can be made from stude to instructor will get the whole "procedure" across, it still doesn't allow the stude to realise in 'reality' it is simply a matter of talking to the controller who is really there to help and formal speak is not really required.
When doing the VHF Marine licence, we were told and trained that all callsigns are spoken three times and such like. But once I had gone and actually used the system for real, it became blindingly obvious this is not the case! It is far more relaxed but still professional. Now that I know this, I am more forthcoming in using the radio as it did sound rather pompous in training.