DogOne,
Are you seriously suggesting that ATC should control VFR traffic 29nm away from Broome at 1,000 feet?
Class D steps make for more sense. The million dollar question is what you put above the Class D, and at what height you put the boundary.
At Hammo 98% of the arriving VFR traffic would call with inbound / transit details a couple of miles before the boundary. If ATC is busy you either have to hold outside the zone or if with a bit of altitude descend below the steps whilst waiting for a clearance.