Demand will always be there if the price is right (ie: cheap). Problem is AL getting the price it wants to profitably operate the routes you described which is unlikely to or else it would have jumped in when Globespan went bust. The other obstacle is that it doesn't have the right size of aircraft to prove routes. The 757s as an interim measure and the A321NEO in the medium to longer term will provide this. The days of flying around 20 people in an A330 to keep a route going in the hope that demand will pick up in the summer are long gone.