I've commented a few times across the various threads here, especially the F menu one, but I agree that the food and wine service is what lets down QF F more than anything else.
On most of the other premium airlines the food and beverage offering is what makes F so special. Krug or Cristal on SQ, Dom Perignon on EK, even Veuve Grand Dame on BA are all special drops. Back in the 747 days QF offered Dom Perignon (I know that's now an EK exclusive), then went to the Taittinger Comptes de Champagne which I didn't like as much but was still very nice bottle. The Pommery Louise on current rotation is nice but not in the same league as the better known drops, and I'm just not a fan of the Piper Rare as it's too much like the Piper NV I can buy for $40 at the local bottlo.
The food side is the same - compared to the full caviar service on SQ (with the vodka accompaniment), having a dried out pastry tartlet with a sprinkle of caviar as an appetiser on QF is pretty disappointing. And on one of my QF1 flights earlier this year I chose a dessert that was literally served in the plastic wrapper as if I'd bought it from the servo.
But I also agree on the service - I've had some great flights in QF F, with crew who seem genuinely happy to be there and who make the whole trip memorable. I've had great service on other airlines - SQ and CX particularly - but it always seems professional and polished and therefore a little sterile. A good crew on QF will joke around, make you feel at home and make enough of an impression that I'll want to leave them positive feedback when I get home. Both my kids have been proactively invited into the coughpit at the end of a flight by QF crew who were happy to spend time talking to them during the flight.
I quite enjoy the mini lounge upstairs, especially when our kids were younger and we could take them there to chat and move about a bit more without disturbing everyone else in the cabin, or when you've got friends or family flying in J and you want to sit together for a chat. That said, I do prefer the SQ upper deck F layout with 6 suites and the lounge space used for the more spacious right-hand bathroom.
And as for the quirks of the seat control screen, my avatar here is still from one of the first QF A380 flights where the seat controls ran Macromedia Flash and they hadn't fully worked out all the bugs...
