B6 is making money on CLT-JFK, but it's below average in margins for JFK. They are moving all these previous JFK slots out of short range E90 markets into the longer range higher capacity Caribbean markets.
They are also adding JFK-PTP seasonally. I think more Caribbean, Latin America routes are still to come. Once they get enough A321NEOs, more of them will be switched to that. That's their way of growing at JFK.
The DCA cuts are probably the biggest change imo. They are giving up on the DC area focus city idea and just using the slots to serve the markets they are strong in.