Point 2 point SWF can be much quicker to downtown than JFK with the stage coach bus that meets inbound aircraft.
The problem from my perspective is two fold, firstly you can’t really go westbound with a full load and even when the aircraft get sat com to allow CPDLC they will still be too heavy to get much above 360, so you have to cap the load.
I think it would be worth taking say 5 or 6 rows out ( loss of 36 seats) and put 2 rows of business class seats restoring 8 seats so a net loss of 28 taking the seating down to 161
The only problem is that on some routes the aircraft do a quick Scandinavia trip between US flights and they tend to be full.