School holidays used to continue into the first week of February, so it's not beyond the bounds of doability to shift the Open by one or two weeks. But to what end?
There are a couple of issues it would solve. For the players they currently have to start on New Year's Day if they want to get a tournament in before AO that gives them a week break. This contributes to the problem of getting very little off season and means they can't enjoy New Year's Eve or New Year's Day with family or friends at home which is a big thing in some countries.
The other problem is that the Australian and New Zealand tournaments and Hong Kong 250 *and* AO qualifying are all crammed into a two week period from New Years Day until the start of AO, and most players want a one week break before AO, so very few high level players are going to play Adelaide, Auckland, or Hobart now.
But I'm now thinking December right before Christmas might be better for AO and the other Australian tournaments just before that, then let them have an off season during January and Feb. It's a bit crazy to have the Asian swing be separate from the Aus swing because it's the same time zone. Currently they have to come to Asia, get jet lag, go back home, get jet lag if it's not in Asia, then back to Aus (same time zone as Asia), more jet lag. Pretty unfair on the players.
Honestly, I don't know if this would help Aus tennis because it'd be end of the season when players are tired (at least if they overdo it in the lead up) but it'd be better for the players overall because they'd skip two rounds of jet lag and get a proper off season and holidays.