The first step is to compare the Laptop Take-off weight with the INIT page B take-off weight.
This should normally trap the ZFW as TOW error.
The only interesting thing out of poison's "write before you think" comment, is the Config 3 take-off.
I don't have a Laptop in front of me for actual numbers , but the Config 2 and particularly Config 3 V speeds would be much lower than those for Config 1. This would undoubtably have an impact on the aircraft's abillity to fly at a much lower indicated airspeed. Config 1, however, does gives better second segment (ie airborne) performance.
Earlier comments about rotating in the reds in a heavy 345 are absolutely true.
This event can not be purely and simply attributed to flight crew. It has root causes right through the EK training department and flight operations management.
Unfortunately, I wonder how much access the Australian ATSB will have to the Emirates training programs, the instructors, TRI's, TRE's, Managers. Draw your own conclusions.
Their report will effectively be crippled without the company's full cooperation.