I mean the other thing that we often forget to take into consideration is that A332/A333 J cabins are relatively small at 26-28J seats. I wouldn't be surprised if U2 is the maximum allocation given that usually they can sell most of the rest
also July is school holidays season both ex-AUS, and then summer ex-Asia. traditionally June - Aug is peak season for a lot of travel which makes it even harder to get a release from the droid
in contrast American routes seem easier to get J released as either they are 787 (42J) or 380 (70J). You almost would assume a slightly higher number could be converted from I to U. Obviously all this is dynamic and I suspect there is a hard quota, then it would get changed algorithmically closer to departure date
obviously the exception to the rule is QF1/2 as we have discussed in this thread before.