IIRC This was a few years ago.. Didn't Danny Buchan leave the track on a Thursday/Friday and come back with his plumber van to repair some of the facilities at one of the venues?
Which is why I would think them leaving is a big loss. New blood is usually a good thing to keep around.
BSB has pretty tight racing but in absolute terms, I don't think the talent level is as high as it was in the 2000s. Ray spent a year trying to stay on the same lap as some beasts of the world stage. That will make a racer faster. Ask SDK.
Something something the worst -insert pro sport- athlete is still better than you could ever imagine.