The Nutts Mutts
This may be the case,but it's only half the picture!,the poor taxiway locations are one major issue,the runway length another!The airports aids( limited ILS cat 1) poor approach Lighting, and Limited opening times all need to be addressed to attract further routes from Easy.,It's difficult to see all this being addressed.
So don't expect much development of Sun routes, especially as Volotea have had ever opportunity to make inroads in this department,but they have not come forward.Airside improvement or if not no real route development.