Para 4.3 Blah blah blah…However, the revised phraseology recommended after the study has been found to be less successful. The phraseology where the callsign is repeated was expected to mitigate the potential for “callsign clipping”; but in doing so, it appears to have introduced additional hazards that were not anticipated by the (Avoiding Action Working) Group.
My italics.
Question. Why were these additional hazards "not anticipated"? Was anyone who does or has done real ATC ever consulted? Who are these people? Have they not heard of the old adage "If it ain't broke, don't fix it"?
I suppose one must be grateful that the guys who actually talk to aeroplanes were listened to eventually. Perhaps this will start a trend?