One thing I find totally baffling is the pre-flight performance by the crew.
They knew that the aircraft would be 'right on the limit' (MTOW), then 'adjusted' the taxy fuel burn by more than 100% to make it appear that the aircraft would be at MTOW at the start of its take-off roll. Just before take-off, it was clear that it hadn't used anything like the 'amended' taxy fuel burn. So they all knew it was over MTOW. But when the departure wind was passed to them, not one single comment was raised by any of the crew about the effect on Regulated TOW.....
They knowingly started the take-off outside the limits required by regulators in terms of scheduled performance. What sort of a company allows such lax attitudes to be prevalent amongst its crews?