For me personally it doesn't annoy me very much unless I am very busy with IFR aircraft or they are within range of a VHF flightwatch frequency or AERIS. But it is a part of ASA's push to push the VFRs (non paying customers) out of the system. Hence the first NAS changes. My understanding is that most "Gumbys" call up for the QNH just to get their voice on the tape or to make sure that their radio is working and they are on the correct frequency. The NAS changes have done nothing (we are still very early on adimittedly) to reduce the number of transmissions. Instead of getting an AQNH request we are now getting more requests for radio checks and/or for METARs which take us longer to find and transmit.
For an old fashioned person like me I think the VFRs are an important part of Australian aviation and the government should be paying for the provision of a safe, government run, air traffic control system for everybody rather than a comercially focused dot.com.