I'll fly SYD-BKK in two weeks and thought about upgrading Y to J but I think I'll just play roullette and see what's happening. I won't ask for upgrades because I don't really like doing that so I'll let you know how it goes.
On the way back I'm happy to try something else i.e. ask people at check-in, in the lounge and at the gate.
Really looking forward to my second flight with EK in Y (well, maybe not in Y)