The SAAB replaced the E145 at NWI because they could'nt get all the freight, baggage and pax on the same a/c, the E145 was a very nice a/c to have on the route, but for the sake of 15 min's flying time, they get a lot more out of the route.
Don't know about elsewhere, but at NWI, they seem to have "come to an agreement" with BMI, both operate at different times - sufficiantly apart to meet demand - and both charge almost exactly the same price, still extortianate, but the demand exists.
Expansion from HUY - I don't think it will ever happen.
HUY has a very small passenger catchment area for scheduled flights, because it is so well served by road and rail networks, and will suffer even more when Finningly opens.
AEULAD, I don't know where you get your info from, but any attempts to operate from HUY to BRU have always been a complete failure, precisely because of lack of demand.
From Humberside's nearest railway station, you can get to London in under 2 hours, then to central Brussels in another 1hr45mins, at a return 1st class fare of under £200.
Whilst that is a 3 and 3/4 hour trip, compare it with a similar amount of time to travel to HUY airport, check in 45mins before, wait for the aeroplane, possible delays due tech/wx/etc, 1hr 30min flight, wait at BRU for baggage (30mins), taxi or bus to centre of BRU - another 45 mins.
Roughly the same time for an air fare of at least £300.