A spokesperson from Mytravel recently said that they remain comitted to HUY, despite DSA being down the road they said that the HUY catchment area served 1million people!
I dont think they have a big presence at HUY and it would make sence to operate from DSA but i think, like thomsons have done, they will stay at HUY! They know there is a market for both airports and why put all its eggs in one basket? There are plenty of passengers to go round, for the forseable future anyway.