All of the lounges in the main part of terminal 2 have been updated in the last year or two. I'd rank them as

JL > AA > QF

The lighting in the JL first lounge is very nice. One inconvenience I noted recently in the JL first lounge is that it seems the entire lounge space is designated no cell phone use.

There's not much of a difference between AA and QF. My experience has been that the QF lounge was busier than the AA lounge, but I gather there's been a dramatic decrease in JP->AU traffic in the last year.

The lounges out at the satellite gates for terminal 2 (the ones you take the people mover to) aren't anywhere near the standard of the main terminal ones. I've mainly used the JL lounge out there because for some reason it seems the easiest one to find, but I think the QF one might have been slightly better. Too many trips through NRT unfortunately (or fortunately actually :-)

The beer robots in the JL lounge in satellite terminal are still my favourite, because they look first generation (and I really like the laser foam guide that the newer ones seem not to have).