Their summer schedule isn't fully released yet. I think we need to chill out here a minute.
Flybe is refocusing its efforts on shorter frequent hops. Jets are no longer based at SOU, it would only be natural there would be fewer longer sectors. If the operation had made money in its previous form for Flybe then the jets wouldn't have left.
I wouldn't be surprised to see more frequency added on these sunshine routes. At least now people can start booking themselves on the route.
Düsseldorf is a new base and hasn't had its flights all put on sale yet. I'd wait a few more weeks before passing final judgement on next years operation.