Sarcasm follows:
Sounds like what was really needed was a full, hard core Catagory A aircraft so that we needn't speculate about engine failure as the cause.
The concept that we as professionals have accepted - routine operations in terrain in poor weather - is going to continue to haunt us with mishaps and drive down public acceptance of our profession. Considering how little money is made in helicopters to begin with, it is my ernest belief that we detract from safety when we fix what is not broken (twin engine performance margins) while we sit placidly by and watch the broken things about the way we operate continue to harm our customers.
The cost to establish helicopter-specific IFR routes and approaches, equip the aircraft and train the crews is small, certainly a fraction of the liability cost of this one "accident". (I use accident in quotes because the definition is a bit strained in most CFIT cases - "an unforeseen and unplanned event or circumstance").
IMHO, CFIT happens, will continue to happen and is not unforseen. Also IMHO, only we can fix it, ppruners.
May the pax and crew of this mishap rest in peace.