I fly with Eastern out of NCL regularly.
A few weeks ago, I was sat opposite a positioning J41 captain, and I asked him about what I thought was an alarming fall in passenger loads on my recent flights. His response was that while certain flights at certain times of the day were really struggling (he quoted Cardiff IIRC), overall, the operation at NCL was showing a slow but steady growth.
As a result he said he fully expected a few of the flights to be axed, or made into transit flights (my guess would be NCL-BHX-CWL, or NCL-BHX-SOU perhaps?), in order to make way for new routes.
Interestingly a new poster in departures at NCL is now advertising NCL-ABZ-OSL.
Great little airline, and one of few companies left that genuinely cares about its passengers.
RTG!