Remember that AS is starting to return the Airbus aircraft back to lessors this year and next and is not getting the MAX deliveries anytime soon. Thus any additions would have to result in cutting other flights. They are most interested in defending the PNW as they stated again on today's earnings call. They are not interested in throwing money down the drain. They also stated quite clearly that they are not interested in adding anything to DAL until the court case is resolved and they have some clarity as to what is happening there. The longer that court case stays alive, the greater the chance is of them pulling out all together than adding anything. They couldn't even figure out what to do with in perimeter slots at LGA, so adding anything that doesn't hit the West Coast from EWR would just be a ridiculous waste of time and money. B6/UA/NK would be able to make better use of the slots.
HI routes are currently their weakest and WN is moving even more assets to HI--thus they are looking at lower levels of profitability there. Defending the PNW and Hawaii routes from the West Coast is far more important than adding random flights on the East Coast that would be guaranteed to lose money.