Why always assume some vanishingly unlikely technical reason?
Everyone is entitled to their own opinion however why always assume human error? Especially if there had been previous problems? I'm not saying it couldn't have been human error however it's by no means
Just my opinion but it looks as though the rate of descend on the inital flare above the treeline is almost zero and I wouldn't have thought vortex ring would be an issue here. The descend from there onwards is quite steep and there doesn't seem to be any collective input until the aircraft touches the ground which would agree with a low NR indication.
Even if the pilot had misjudged the approach why not apply power and check the rate of descend or go around (assuming this is not vortex ring)? I haven't flown the aircraft in question and don't know the environmental conditions (weight/altitude/temp) but I would have though the aircraft would at least be able to arrest the rate of descend?
Also according to the accident report the pilot did not intend to land at the helipad?