When I'm traveling UA is still showing the 2 class 777 which isn't until March. I cxl'd my F award and ended up buying J BKK-BNE (refundable less 2000 baht). I'll randomly check and see if awards open up but by the first of the year seeing how things go with them and the route the next few months I may just ask them to switch to SYD F and pay the fare difference.
This was a special "treat of a trip" that included the ex-BKK in F as I don't think I'll be able to visit S.E.A. for about another year after that.