Keith,
Just to confirm, your hypothesis then is that V2 at the lowest weight of 40,000 kg and when in area A (low PA, low temperature) may be greater than 1.2 Vs?
If so then I understand what you have written. It would be interesting to have the V stall speeds that were used for certification, so that one can multiply them by 1.2 and compare this number to the published V2.
good explanations!!