On the contrary it could be viewed a masterclass in strategy & gaming all the opposition.
That will include the rival airlines such as Delta who have already jumped & disrupts others strategic planning,the airframer as it might appear Airbus will let them upgrade to the A321XLR a much more expensive model free of charge & of course the LON airports,tho they may well know far more than they can publicise.
Time perhaps to press feeder talks in LON.
It enhances their market value in the very predatory US airline market.
It suits their purpose too as the airframes are not available until 2021.