To me BWI makes sense. As we take delivery of more airplanes, BWI can expand more than ACY. Isnt BWI like 20-30+ departures a day? Maybe they both stay a base since we are the only carrier in ACY and it can cover NYC and BWI has lots of its own departures.
But another east coast base makes sense as we get our way towards 177 (hopefully many many more) aircraft. There will be plenty of folks wanting that base.
But at the same time, the same could be said for any major airports that we have lots of departures at.