Dinara Safina won't be playing, presumably.
Lots of others will probably copy Garbine and not go - given the fact that there are dozens of ITFs in Australia before Christmas, it surely wouldn't hurt to have a couple either side of the GS qualifying to make it worth the trip for those players who are unable to get into qualifying for the pre-AO WTA tournaments. Fellow posters are correct to mention the US absentees - this happened last year so I would expect a few of the American players around the 180-230 mark to be out.
The AO qualifying also suffers because if players pull out of qualifying, there is no-one to replace them as no-one will fly out all that way on the off-chance unless they are in the juniors/doubles etc, which meant the cut-off was as low as 348 quite recently!
Wimbledon recently added an extra Nottingham ITF which was a great boost for grass court practice for players after Roland Garros.