@nivsy It's a bit harsh to say that it 'just does not seem to last' - it was last operated by AF 17 years ago.
GLA's rolling figure is circa 8.7 million just now. GLA loses out to EDI because of the large inbound tourism market in Edinburgh. EDI took off in the last few years thanks to new ownership and carriers came flocking. Glasgow is also split between two airports, GLA and PIK, albeit PIK seeing less than 1m pax per annum. The catchment areas are similar for both GLA and EDI.
Re DUS, it's operated by Eurowings. It's currently 4x weekly but will return to 6x weekly in May. Equipment also switches from CRJ900 to A320 in October.
@mwm991 I'm led to believe that the MUC service did well in 2015. In 2016 it will operate in the morning rather than last year's late afternoon service.