We have to be consistent through out a tournament so if we keep this rule for the Australian Open we can obviously adjust it as soon as it's finished.
This is the first time you have introduced a 3 set match along with a 5 set match. The first day indeed. There is no consistency issue at all.
From "How to play: Read-the-Round"
Points are given for correctly predicting the following:
1 point - winner's name.
2 points - winner's name and the number of sets in a 3 set match.
3 points - winner's name and the number of sets in a 5 set match.