If the aim is to turn a profit and keep the operation in the black for the short and medium term, then would it not make sense to defer the arrival of the boeings. Changing your business model is one thing and there are significant costs involved in that, but completely switching the entire airline from one type to another almost (yes I know there are a couple of A330/757s) entirely just doesn't make sense to me. The A320 can't be that much more inefficient than the 737-MAX. If the own some of the fleet already and it is paid for the any fuel saving will likely be offset by the finance payments for an entire new fleet. It just doesn't make sense to me.