I wouldn't take this too seriously.

In essence BA think they can run the 777 service to JFK with Club Suites, and that will lead to First having 6 seats. Now it's better to plan on this basis than the alternative, having 14F and then swapping it down to 6F. But so much can change between now and then, not least whether travel is viable next year in view of the current restrictions. I certainly don't think all of JFK is going to be CS, but it's an obvious strategy to have on that route. But as a general point, First is going to become a rarer option going forward.