Class E & Class D Towers work. But they need surveillance, not half arsed surveillance but surveillance that covers all of the E airspace. Asking a controller in Australia to separate IFR procedurally in E when they have no idea whether a VFR is in that airspace is asking for trouble.
Either provide surveillance or don't. But as the approach dood says, money talks, ASA certainly won't spend the money to fix it, the government hasn't got 2 bob to rub together and Tassie deserves a whole lot better than they're getting.