Before FR and NQY fell out I used to think they could make a good go of flights from Hahn, though at that time they only did daily flights year-round so perhaps they felt there wasn't enough in the winter for them though Kerry seemed to work, or perhaps no route support was forthcoming.
Nowadays of course FR do low frequency seasonal routes, which would fit NQY perfectly from the likes of Hahn, Neiderrhein, Charleroi and possibly even Skavsta. If someone at Cornwall County Council had some imagination it is just the sort of opportunity that should be explored.
Didn't NQY receive Swiss flights at one time?