QTG - that is exactly the point, 40 years on the replacement doesn't actually have the same (essential in my view) capability as the aged Sea King.
I know that modern autopilots allow the HP to monitor the aircraft rather than the NHP monitoring the HP but that is only valid until some parts of the system fail and you are back to square one.
Tallsar, we keep coming back to the 2 issues we knew a long time ago would be the crucial ones - radar letdowns and NVG