I agree Senator, the north Atlantic seems to be a logical earner for BA and by all accounts a market where they have done well in the past.
However whilst you are right that no-one would logically fly to JFK via Dubai, the reality is that Qatar will soon be flying from Athens to JFK and EK from Milan to JFK. So if fares were sufficiently attractive they could easily start to pick up business from UK, on the same basis that some users of this forum are willing to tack on an additional flight to Europe to access cheaper fares.
I’m not sure that a free-for-all will result, however it isn’t hard to see other European countries allowing such flights if there were economic benefits to doing so and capacity available.
In relation to VK’s post it appears that BA really are currently on a hang on in there strategy. Time will tell where this leaves them once the Iberia mess has been sorted out, and the cashflow effects of new planes take hold.