I think the "engine failure/PFL" case is being overstated.
Again, the route in question is NOT given to single engined helicopters. The risk of two helicopter turbine engines failing simultaneously is very small indeed. The S-76 (and other twin engined helicopters) provides Class A performance, just like a good multi-engined fixed wing can i.e. the aircraft can either safely land on below takeoff decision point (a speed/ height combination) or continue with the climb and cruise to a safe landing elsewhere, albeit at a reduced cruise speed.