It's not surprising that people are annoyed about Fisherwick's sudden jumping ship from the UCU Leagues. There's also talk about ulterior motives. Before everyone gets worked up into a frazzle, it might just be worth pointing out a few things.
Nobody complained when Fisherwick used to run its open-to-all club championship during the League season - and nobody does now, when its near-neighbour does the same thing now. If Fisherwick CC wants to run its own competition(s), let them get on with it. If the UCU is confident that it's putting together a good programme of events, what is there to be concerned about? If Fisherwick's events go down like a lead balloon, nothing will have been lost. On the other hand if they complement the UCU ones, that will be a bonus and the UCU might even learn something useful.
Fisherwick CC has made (and can still make) a significant contribution to Ulster chess. It has had a long-held reputation as a strong club in both quality and quantity but it might now need a period of regrowth. About eights years ago Fisherwick opted not to play in the Silver King (though in those days they still had a "second" team) but the following season they were back. Let's hope that will happen again (and indeed encourage them to re-engage rather than treating the club as some sort of pariah).