OK, in an attempt to try and prevent this becoming another of those threads where the Muppeteers try to take over the thread with speculation based on ignorance let's try to stick to the facts and... wait for it... educated speculation. All we can tell from the news story and the a/c's track is that at some stage the crew decided to divert to JFK. There is no mention that the decision to divert was taken at the time of actual engine failure.
It is possible that they had some indications that were worrying them and they decided to divert to JFK where they had suitable engineering and pax support. It is also possible that whilst having diverted and heading for JFK that the engine later failed and was shut down.
We don't need PC Flight Sim 'experts' jumping to conclusions based on their own limited ideas of ETOPS. Assuming that the engine actually failed where the diversion appears to have started obviously leads to the hand wringing and wailing of those who believe that the a/c should have done a dirty dive for the nearest piece of flat earth at that time. None of you know the full details and it is quite possible that the diversion was initiated long before the actual engine failure.