"As for Dusseldorf, well, look at Air Berlin..."
Your point being? Their MAN-DUS route was a disaster. Too much competition from established full service boys at MAN + two CGN services from MAN and LPL. No room for them it seemed and I seriously doubt Jet2 will be foolish enough to try and force their way in.
Almost every route Jet2 has started from MAN has been scaled back and I see from the winter schedules that even MAN-AGP is just 3 x weekly which is another one to add to the list. Expansion in the NW is much more likely to come at Blackpool which is at least not on the doorstep of Ryanair and Easy at LPL.
loco