TM - DB and I are both experienced pilots / trainers with a strong desire to improve the current situation. I have a lot of respect for DB in many areas including his promotion of the use of automation on the 225 which, amazingly, was in general spurned by the other operators (including DB's former employer) or at the very least, not used optimally and side-lined in training and operating procedures. So in many areas we agree. However in the area of trim release and the concept of flying through an upper mode, it seems we disagree.
Of course the trouble is that we both absolutely KNOW that we are right. And when you know you are right, why would you contemplate adopting the other's views? It would be a traitorous act when best practice is your goal.
Faced with this sort of disagreement over a relatively minor (though important) way to fly the aircraft, what hope is there that the 3 main (and a few more minor) operators and the OEM could be dragged screaming into some sort of consensus on the best way to operate this type, even in the N Sea never mind worldwide!
When the EC225 was introduced into Bristow Norway roughly 6 years after its introduction in Aberdeen, they declined to adopt Bristow Aberdeen's way of operating and instead wrote their own checklists etc which were at odds with the philosophy on this side of the N Sea (although to be fair, certainly adopting some aspects of it). So a Bristow pilot from Aberdeen crossing the sea would have had to adapt to the Bristow Norway way of operating - different SOPs and checklists - and that is within the same company!