It is instructive to look back at the various posts on this thread in late April when DL announced upgrade from a 757 to a 767. Let's just say that it is clear that Skipness-One -Echo, VickersViscount and CabinCrewe have a somewhat better understanding of the industry than A350Saltire and GoEDI.
One assumes that EDI offered a "deal" for DL to introduce JFK - why? Why add more seats to a route that clearly doesn't need them and further stress EDI's inadequate facilities (see my previous posts)!