I seem to remember that Berlin was doing a roaring trade and it was dropped.
The same with Prague.
These tend to be one off visits unlike the Spanish sun routes say where people go every year or Dubai which is a gateway to the East.
NCL is much like GLA, comparing unfavourably with EDI where (I suspect via aggressive discounting) which is now a major European city in a way it wasn't until recent years.
These are difficult times
Actually these are good days, some of the best, take a step back, we went through a loco bubble which has skewed perceptions. More people are flying more often, but we still have too many airports with marginal business models fighting on the margins in the regions.