It's difficult to see how crowding will be a big issue at the JFK lounge when it is allegedly larger than the all access SkyClub, and that club must provide access to many times more customers

I fly both D1 and Y/regular F out of JFK, so the changes should be positive for all (less crowded in both lounges). I don't see Delta downgrading the regular JFK SkyClub given what they have done at their other clubs