I have not heard one pilot here say they "want JFK slots". Maybe some legacy United people living in Long Island that are driving to EWR now but other than that its not widely talked about at all. Only thing management has ever said about JFK is bringing back the Premium Service flights and building out existing hubs. The current focus is ORD, DEN and IAH with some increase in WB flights as new 787s are being delivered. Not trying to start a new hub from scratch in super competitive JFK where you are now competing with every airline in the world, including Delta and AA. If anything that's a reason to NOT try and hub there.

Most pilots based in EWR either live in PA or NJ or commute. I can't imagine anyone wanting to now have to drive past EWR to get to JFK or commute offline to JFK to start/end a trip unless they live right near the airport. If they aren't on the Airbus it won't matter because that's the plane that going to be flying in and out of there (for now) and nobody is going to give up their WB job just to fly domestic transcons.