Yes, twice in one summer in fact. I flew F (or really O) from LAX-SYD last June and then LAX-SYD-MEL last August. If you remember (seems your memory is pretty good) my flight back was canceled and I was placed on AC LAX-YVR-YYZ to get home. The AC was two cabin with a "business/first" which was just about as good as the UA F.
Yup, like I said the biggest loss is the award space down under, not the class itself.
Either way, it's a phase out, so enjoy while it lasts.