I think much is being lost in translation and interpretation here, and before the thread creep goes completely off topic, it is fair to say we are now splitting hairs over what constitutes an en-route diversion - planned or otherwise. We could be here for months with that one.
However, I hope it is fair to say that the point has been made regarding the airmanship points raised and that there was no excuse for the behaviour of the pilot concerned on Saturday.
For the avoidance of any doubters, the Elvington NOTAM was contained in the en route NOTAMs and not the aerodrome information for CF. CF was merely used as an example of an aerodrome that may be used within a route brief. Any further discussion on individual planning preferences are really not relevant to the thread. Suffice to say that as long a reasonable planning is taking place, then that satifies the requirement in the ANO.