I don't think Thompson had any intent on pulling out of HUY.
I feel Thompson are maybe playing the 'foothold' self-preservation game at HUY. If a low cost showed an interest in HUY, then I think you might see Thompson or a Thompson subsidiary increase the activity there.
As it stands now I think you'll find Thompson are playing the waiting game at HUY. If it doesn't feel threatened then it has no need to increase destinations, particularly as DSA is seemingly their pet project and most new routes are going from there. Which works well for me since I am a DSA supporter.
At the moment Thompson is a bit like Scunthorpe........both sitting very pretty, and in a win win situation.
However, one thing I have learnt since taking an interest in this kind of subject, is that it's certainly a 'cut-throat' and 'dog-eat-dog' business.
When (I think it's only a matter of time until it does) a second lo co operates from DSA, it might just might have a positive knock on affect at HUY.