Shane Watson was named man of the match for his 93 in the first innings and unbeaten 120 - his maiden Test century - in the second, while Johnson's three second-innings victims mean he finishes 2009 with 63 Test wickets.
Captain Ricky Ponting has defended Lehmann's form with the bat but the inclusion of MacGill and Watson in an expanded 13-man squad is a sign the selectors are considering a change.