Trying not to be too negative, the BBB (there is no H anymore) is not really comparable to Classic Dirt when you view it from the Dirt Bike perspective only.
Sure it may be a good "all round" Classic Bike event, but having held Classic Dirt at several venues now (including Broadford), Broadford just doesn't compare well to the Conondale Facility as an overall dirt bike venue, which is why we haven't ever considered going back to Broadford for Classic Dirt.
At Conondale we had 3 MX tracks, A super grass track, A really good enduro loop and also fantastic trials sections. A bonus is that the facility is basically flat ground, which is good for camping and general getting around. Those are the factors that help a lot in making Classic Dirt at Conondale the success that it is.
Having said that, the BBB is no doubt a great event in it's own right and should continue if MA keeps supporting it. It's just not Classic Dirt!