Yes i agree the area is not of any great interest of inbound passengers except business! Generaly the flights to the tourist destinations dont attract inbound either people who use them are actualy from the area on a return ticket, as far as i know anyway! The ones i could see potential in are LGW/LHR (which is unlikely at the latter for obvious reasons! CPH via Esbjerg (to support the shipping industry in the area (I presume thats why its popular with people from HUY to go there via AMS)! CDG for an alternative to AMS, DUB possibly but at a daily frequency at the most, with a LCC! And a few Lo-co favorites like Alicante, malaga, faro palma!
I know that some of these will probably never happen but im optimistic that a Lo-co of some sort will come in and at least serve the core routes listed above! As long as HUY keeps the AMS then im quite happy!