I'm not hugely happy about this, but it has had significant discussion over the past 18 months or so and has been part of the last round of CASA safety briefings and has had extensive discussion in RAPAC. It shouldn't be a surprise. Many arguments were put, but now we just have to face up to dealing with it. At the end of the day, its pretty much the situation we had 20 or more years ago before the steps were relaxed.
The RWY 34GLS approach is only used on strong Nth wind days, so traffic flying the approach will not be common.
The real concern is that it compresses the vertical separation of the "light aircraft lane". You can still transit it at 2,000ft but you're going to have to have good altitude discipline if you don't want to suffer airspace incursion.
And the proposed flying school for Chinese students at Bacchus Marsh will add to the complexity at the western end.