Your bolded sentences correspond to my words:
Federer:..., 除非克服自己的反手缺点。
One of the most important things to win a match is to use your strength to fight weakness of your opponent, while improving your own weakness. Nadal, Murray, and Djok have all learned this. Unfortunately, Federer has not learned this. His forehand is super; everyone knows this. So Nadal avoids to hit into his forehand as careful as possible, unless Nadal is in control during a rally. However, Federer has not found an effective way to use his forehand to win Nadal.
Can you pinpoint any progress that Federer showed during Australia Open compared to his last year's matches?