james4th,
you are partly right -- the crew should have made a decision to continue to the threshold some point prior to crossing the piano keys....
but...
we have all had a crap touchdown after an excellent final approach!
before you get too hard on the captain for a 'late' go around, factor in the following.
The crew would have been aiming 300m in to the touchdown markers.
Crossing the threshold at say, 120knots IAS, they would have been doing around 60 metres per second or better.
After passing the 450m touchdown markers, they may have recognised that they were out of shape for a landing.
They then, if they followed their training, would NOT have done the GA 'fark' go around.
Someone may have announced "go around." Then whomever was flying would have smoothly increased power (or the TOGA buttons would have done so) to go around power, and the flying pilot would have smoothly rotated to the go around attitude at 3 to 4 degrees per second, as he/she had had it drummed into them!
Then the aircraft would have rotated first, and climbed second! Would not be at all surprised if a 150,000kg+ aeroplane had enough downward momentum to touch down near the intersection before the rotation turned it into a climbing aeroplane.
Would not be at all surprised if this activity took several hundred metres of runway to achieve.
And none of it a problem because I am sure they cleared the other threshold by better than 35 feet. and better than 3.3% in a 20.7.1B "twin" with all engines operating.