Dilvish, I would see more troops and planes sent to Australia. Certainly Britain could send a couple of divisions, they have ample troops sitting at home doing not much. It would of course probably rule out any 1943 invasion of France, but thay'd be quite happy with that.
It might delay Torch, but that isn't going to make a huge difference, NA will still be cleared in 43.
In OTL, an invasion of Australia was seen as impossible after Midway, so there wasnt the pressuer to send tropps (except in the monds of certain self-serving Australian politicos...), but if the threat was seen as realistic, much more could be done, other things could be postponed without too many issues. (an actual landing in Oz would be seen as very serious in the UK, due to the public reaction. Countries like Malaya, Burma, are one thing, a country with close links and so many family connections as Oz is something else entirely.)