On the one hand, I understand why UA wants to minimize presence at one of 3 NYC airport when it has a fortress hub at EWR (as certain Jersey people would say, "nothing personal, just business").
On the other hand, would be nice to have more presence at JFK due to a vast amount of *A flights at JFK, so as to make the network truly outstanding. Unless, of course, if UA can convince all their partners to switch from JFK to EWR, which I know ain't happening. (But of course, UA tends to reward those who fly UA metal more, so this point maybe moot).