I've been looking forward to the new SYD and NRT F lounges so I'm disappointed to hear people say they're less than wonderful. Maybe some of us are just a tad jaded already?
BTW there's a thread on the BA forum on how you can now book the spa treatments ahead if you're in F.
Don't forget the BA arrivals lounge at T5. I've only used the T1 and T4 ones in the past, but the reports say there's an F dining area (nothing special about that part) and the whole thing including spa is pretty good). BA also uses an arrivals lounge (shared) at JNB. Are there any other arrivals lounges for OW carriers?