PSO
Do the EU rules on PSO not state something about subsides are only until such times as surface transport links are improved or something as i vaguely remember somthing a while ago about DUB-BFS/BHD not being applicable as two existing EU funded projects linked the two cities, the railway upgrade and the Motorway work.
If that is the case I would say for sure thats the end of the PSO for most internal flights except maybe CFN.
Would much smaller a/c eg Jetstream/twin otter/B1900 etc make the route pay post no PSO grant? That is if you could get an operator to operate the routes.