Councils and passengers can bitch and moan about a service being reduced and/or withdrawn but the plain simple fact remains that if they don't use the service (or drive to other ports to use theirs) it will be withdrawn. Moree Plain Shire Council offer next to no incentive (apart from a single digit percentage rate off the landing fees) to keep the service operating.
Heavily utilised aircraft (possibly over utilised on some days - 15 minute turn arounds were always a winner with crews.... not) of course go U/S from time to time and the airline is expected to pull a spare aircraft out of thin air, weather and traffic delays in and out of Sydney - not to mention try explaining what an hour plus Metron delay is to passengers with connections, or why their service is two hours late getting there because ATC flow massively delayed the first leg of a six sector day and you've had to go like stink just to whittle their delay down to what it is... Of course it is always the airline's fault the short-memoried locals get farted about - it always and invariably is and don't the front line staff get to hear about it...
Puff, there are a multitude of reasons why they didn't use one aircraft over another, pavement concessions and a few other reasons spring to mind as many strips around the place are not built strong enough for many types to operate multiple times a day. Though I will say one thing... BAH did look at the Braz and there were enough good reasons not to use it.