CM - The QNH point was a reply to a post by Above the clouds, which he has since deleted, and as you see from my reply I agree with your point.
Height, weight, temp, you've provided a view and one can respect that, i don't know how often, in what aircraft weight or config, or when he practiced, hence the question. You seem to have clarified this.
Those looking for fault or any deviation from authorisation and possible repercussions will now be able to look for something else to latch onto and beat to death. Your blood lust unsatisfied, you will doubtless be very disappointed.
I don't think that is what people are doing, they are just asking the question and actually given your final paragraph if the AAIB do recommend change would you then say that such a change is wrong and unnecessary?