It seems like the Allies use their bid for the Europe board 99.99% of the time, and those are also 99.99% UK placements.
If you were going to be forced to try and be clever on the Pacific board, what would you do? The best thing I’ve seen so far is the ANZAC Infantry for New Guinea. Are there any other clever moves? You could try stacking Chinese Infantry in Yunnan, but I’m not sure how helpful that is (compared with other things). I’ve had games where the Japanese failed to take Yunnan J1 and it didn’t really matter that much.
I think this illustrates how far off the Pacific board is in terms of balance- if the Allies had more of a chance on that board, you might see people using their bid there more often since they would get more out of it. As it is that extra 9 - 12 IPCs is just going to be swept away by Japan.