Reference your comment,
turbine aircraft are kept on a descent profile that for the most part alleviates conflicts with VFR traffic.
I fly a 146 in and out of Alice Springs on a regular basis, as do many others. We're in Class E from FL245 to A045. There is no descent profile we can fly that alleviates conflict with VFR Traffic.
Conflicting VFR traffic moitoring the
appropriate frequency, could be on Alice Tower - 118.3, Melbourne Centre - 128.85, though they are encouraged not to talk on an ATC frequency, or 119.8 the local Class G frequency.
As IFR I'm handed from Melb Centre, 128.85 to Alice Tower 118.3 or vice versa. I've only got two VHF and can't monitor both of the other two logical possibilities.
As an aside, I was asked about the airspace this weekend gone by two lawyer friends, one a Law Dean at a Southern Uni, the other a high flyer in the Attourney General's dept. Both were aghast.