Albatross,
I flew that Sim Scenario as the victim and as the Instructor......lots of times.
It is an attention getter.
Once paired with an up and coming young Spark with him at the controls and watched some serious learning be accomplished.
My opining that he would be experiencing some real turbulence and interesting weather conditions I was informed he knew about such from his time on the North Sea.
During the ILS he correctly identified a sink rate that he appeared unable to correct.....was advised to pull maximum power and reduce his IAS to Vbroc (as you described)
He did...and reported the sink rate was still excessive.....and demonstrated he felt he had done everything he could do.....when I reached down and pulled the Collective up until we bled Nr to 90% or so thus gaining control of the sink rate.
We broke out of cloud to see the airport and probably. were harvesting ears of corn (virtually).
My comment about Redlines being for normal operations and there being nothing normal about crashing....seemed to bother him somewhat but he did admit to the wisdom if not caring for the delivery.
The operator we flew for at the time incorporated as part of a continued takeoff after an engine failure the procedure of bleeding off the Nr and my view was if it was fine and dandy to do it VMC during OEI procedures then doing it IMC and crashing it was ok to do it with both engines running.
As to the CRM thing of having the Non-Handling Pilot handle the Collective.....could be a blessing and a curse.
How would you structure the CRM technique, procedure, control, and determination of who moves the collective and in what manner and to what extent would take some serious thought and structure.
Bottom line question....some of these aircraft are flown Single Pilot IFR....Bell 412's for instance.....are we saying a Single Pilot is not capable of controlling the aircraft that such a CRM Technique would be required if there was a second Pilot?
I might not be a hard headed as that Checkf Pilot that took complete refusal but I would ask that the justification be well sourced and it be proven such a procedure be needed and structured for the maximum safety and minimum risk of complications that could pose additional risks.