The statistically unlikely occurence of a second engine failure on a 747 means you become a perfectly flyable twin engine aircraft much like all the other 767 and 777 and 330 aircraft plying the ocean that day.
As all PPRuNers know - aviation IS the calculated balance of risk. Usually with one of our backsides strapped firmly to the final calculation. Its what we are paid for.
Do you - in the final analysis - think that the Captain and the Senior/Junior First Officers aboard this aircraft elected to carry on when they were IN ANY WAY nervous or anxious or mildly concerned for their own safety? They've got their own wife and kids to think about and would have little hesitation in putting it down in say New York. Easy Peasy. But no need.
I find it informative to read, in even the quality press, stories about which I have some personal insight. Makes you realise how everything else you read is largely ignorant summary.
Cheers
WWW