Probably not surprising, given the movement rate is a fraction of the "good old days", about one half and dropping. The "free weekends" doesn't seem to have made the slightest difference to the utilization.
Hardly surprising... a single visit in a 182 costs over $40 with about half each for BAL and Airservices and another $20 per day for parking. You don't get much for that, other than virtually no facilities, and sarcastic, unhelpful, rude and inefficient 'service'. All of which is a direct result of the management poliices of both organisations.
I'd love to base a plane or two there but who in their right mind would? They really have to do a lot better if they want anyone to go there. More warehouses factories and hyperstores seem inevitable. The owners really are not serious about it remaining an airport anyway. Let them have it, its a lost cause and lets find a sensible place for a GA airport in the Sydney basin - and keep the likes of Sydney Metro Airports and Airservices well out of it!