HC,
Nice Rant....but you have some facts out of whack.
I am familiar with single pilot IFR in several kinds of aircraft....fixed and rotary.
Yes lots of VFR/VMC but enough VFR/IMC and IFR/IMC to know of what I speak.
I don't suppose in your modern world....one can lean over towards the other pilots side and monitor events on his side of the cab....or is that not allowed these days?
When you were instructing....did you demonstrate maneuvers using your instruments or the Student's?
During an Instrument Approach....what critical information is not displayed on the on the Non-Handling Pilot's side that cannot be seen on all of the other sources?
Are you, as usual, trying to make a Mountain here?
I would be far more concerned about hidden screens....that layered as malfunctions occur and you have to work your way down through the stack because the system does not present the most critical failure ahead of all of the others.
The lack of a Screen surely has nothing to do with CRM.....or do you wish to explain how you took that road off the Roundabout?