AerArann62w,
I guess your question could be phrased 'is it likely at this stage that Stobart Air (former AerArannRegional) would consider a return to the SEN WAT route .... My guess is no, though things are improving in Ireland a London route would seem the logical progression. Luton maybe more than SEN as history has shown it to be more popular.
When the runway gets extended I'd expect FR to be keen to do it, returning to its origin in Waterford ... Not sure when the runway will be extended...