I totally agree with the conflab re Jet2, their timetable does not make much sense, maybe an ammendment to the timetable will appear in due course, though an extra route is very possible shortly.
Why are the loco airlines now changing their once, quite rigid policy and offering flights on less than a daily frequency? I do recall easy's policy was that if a flight could not be operated daily then they would never attempt it, bt now flights operate 2, 3 and4 times weekly only, atleast from NCL. The same goes for Jet2, though Ryanair seems to stick to a rigid daily schedule.
With only approx 4 months to go until the start of the summer schedule, there is still enough time for further announcements, however personally I do expect a lull in new airlines/routes.
I see SkyEurope Airlines are expanding in the UK, with new flights to BHX and EDI. Is NCL-KRK a possibility, maybe 3 times per week?