If I were you I'd test the commute at peak hours, we did that before committing, we don't find it too bad and there is generally enough traffic along the road that its not too dark, obviously dusk and dawn be wildlife aware in the more country lined parts through Pinjarra Hills. We both commute, one to Stafford via the tunnel and one to Indooroopilly and back peak school hours, its not that bad - depends where you are going - don't forget you also have the option of the ferry if you are heading south or west. Its a lovely community out here and for me I enjoy the drive as I wind up on the way in and by the time I get home having listened to a podcast or music I'm relaxed again. We've now got a load more amenities at Moggill Village and the new builds have seen a big price increase since that so I'd say its a good area to get bang for your back and a safe country feel lifestyle.
Best of luck with your move, wherever you end up.
Rebecca, Green and Co Real Estate, Moggill.