Yes, I was there on January 4 - OneWorld, Qantas, Centurion were all closed!
My Plan B was to go to the KAL Lounge - but they don't accept Priority Passes any more!
Star Alliance was accepting OneWorld passengers (BA at least).......didn't realise this as I had connected! So in the end went to Admirals Club T4, and moved to T5 as it was pretty busy.
At least I got my 10,000 steps in!