Hello Paul,
I beg to differ I am afraid.
I believe that the aircraft landed long and fast and in an effort not to go off the end put it in the grass.
He landed (from my perspective) after the 27/09 intersection. I am not going to lay claim to knowing the speed he was doing but it was higher than the usual approach speed.
Similarly if you look at the location of the aircraft when it came to a stop, its at almost 90 degrees to the runway with the main wheels on the edge of the runway. If he had been attempting a 180 he would not of done it from the centreline and there would be a distinct angle between the main wheels and the runway - unless he got it seriously wrong.
Lastly you know what the hill is like going up 14 towards the 32 end, and there is little runway remaining. I would hazard a guess he got to the top of that hill and realised how little runway remained at his high speed.