There are more reasons than those two Una Due Tfc. One other reason is overflying rights through Russian airspace. Today all overflying rights in the bilateral agreement between Russia and Scandinavia are assigned to SAS, and Norwegian is not allowed to fly over Russian territory. On the Asian flights Norwegian because of this have to fly between 10% and 15% extra distance (after the unrest over the Crimean Peninsula more distance had to be added).
Again Skipness, you seems to be misinformed about the crew on board the Norwegian Dreamliners:
Cabin crew: Thai, Americans and Nordic (we may at later stage see British and Spanish cabin crew).
Pilots: Europeans (they all need JAA license and passport from one of the EEA countries). The 787 chief pilot comes from Skåne/Scania, Sweden and has previously flown with Korean Air, EVA Airways, FlyMe ...