If a VFR aircraft flew through that airspace at that position today, you would not know it. You cannot see that far – even with binoculars.
..... bzzzzz wrong .... LT is one of the only D regionals with PRIM and SSR Radar to surface ..... that was as a direct involvement of Senator Barnett after the LT (Class E) incident referred to!
However if you were properly provided with an approach radar (as per the Minister’s directive) the dedicated approach controller would obtain a primary return and at least be able to give traffic on the aircraft that was there without a clearance.
... I say again, where is the data on non-TXPDR VCA's that supports your attempts to make the cost of regional terminal C prohibitive? ... cause OZ procedural C (without PRIM radar) is demonstrably safe!!!