Feb 1st UA lax-syd looks ok.. but I would def try to get on the SFO-SYD it looks much better!! 60 coach and 32 biz open.
Mel connection is wide open

Coming back UA mel-syd is wide open and so is syd-lax and syd-sfo. They are both about half open in every cabin. But I would plan sfo if you can, those are usualy alot easier.

PM me a few days ahead if u want real loads