Amex Reserve and other credit card members should benefit from less crowding at the current SkyClubs. JFK in particular should benefit - you have seen the new Delta Concourse A Club, as well as a Chase lounge open in recent months. The new Delta One Club should make the main “Delta” clubs - Centurion Lounge snd SkyClub Concourse B - much more pleasant on average. Remember that the Delta Reserve card retains unlimited access to the Centurion Lounge when on Delta flights.