When more than 100 people were killed on Piper Alpha there was a massive HSE revolution. It changed the perception of acceptable risk in the NS for ever. That's the way it is in the oil business - my opinion or anyone else's can only be that.
This very unfortunate run for the Puma will have the same effect in Helicopter operations. People who think this is just another inevitable fatal accident are missing the point. The passengers aren't really interested in the fact that this latest incident was or was not caused by planet gear failure, suspension bars, bevel gear, vortex loss of control or anything else. They simply will not tolerate 5 hull losses in seven years. A line has been crossed. If you don't get that then you don't get NS HSE culture.
The pax know helicopter accidents are inevitable, they also know many good men and women already dedicate themselves to helicopter safey. But they will require, and will get a further step up in safer flying. So at least one good thing will come out of this tragedy.