There is support for making the recommended upper limit of the MULTICOM at 3000ft agl. This would help ensure that low level ops would know the primary recommended frequency in that airspace. It would cover by default all airfields in G that are not covered by a BA or a CTAF with its own frequency.
and
I suggest that 'in the vicinity' is a better description and better caters for aircraft with different performance and allows pilots to make an appropriate judgement on when to make an inbound call.
Works for me, if the widespread push is for a low level MULTICOM.
I can see 126.7 becoming far busier though, so many ADs that currently use CTAF 126.7 will no doubt apply to CASA to consider allocation of a discrete frequency.