CityJet operate ageing four engined Avro's as well as the seriously old Fokker aircraft which are no longer sustainable and contributing to there bulging losses - If they are that brainy enough to secure some kind of future I think they will be overlooking Waterford - There Cardiff routes particularly Glasgow and Paris I would give maybe 2 years.
Unless CityJet overhaul there fleet (new Bombardier CSeries springs to mind) they are going to keep going on a downward spiral - problem is who would invest such money, when being honest they don't exactly have the route portfolio to die for.
That is why there is an issue selling it, the airlines requires substantial investment and huge cost cutting.