Principled Adherence should be weighed differently than SOP itself. The former reflects flight discipline and a systematic way of adressing threats. The latter is negotiable, transient, and widely varied. Your airline and mine operate the Airbus family. Yet 8 items on your list either contradict our SOP or are not addressed at all. Yet in our fleets several million hours we haven't bent anything. So there is more than one (safe!) way to skin a cat.
Very wise words.