Aaron Finch's captaincy is a key asset to Australia's side but his batting form is concerning. He has reached 50 just once in his last 18 innings and has nine single-figure scores and is striking at just 111.57. In this series, he scored just 78 runs in five innings at a strike rate of 91.76. The batting surfaces were more challenging than expected and scores overall were low. But he was pinned down by both spin and pace.
Josh Inglis took to international cricket like a duck to water in this series. He looked magnificent at both No. 3 and No. 5, capable of both capitalising on good starts or bailing the team out of trouble, as he did in the fourth T20I at the MCG. He reached 20 in every innings and made 155 runs in five hits striking at 143.51. His versatility and his ability to score at a quick rate against both pace and spin, without taking reckless risks, begs the question if he's a better option than Smith as Australia's Mr. Fix It in the middle order.
Hazlewood could easily have been the Player of the Series despite only playing three games. He took eight wickets at 8.12 with an extraordinary economy rate of 5.41. He also bowled a superb Super Over to help Australia claim victory in the second T20I in Sydney. Following on from his 3 for 16 in the T20 World Cup final, he may have taken the mantle from Starc as Australia's premier T20I fast bowler. Starc's own form in T20Is has been far from his best in recent times. In his last three T20Is, including the T20 World Cup final and two matches in this series, he has bowled 12 overs without taking a wicket while conceding 131 runs. Australia do have some bench strength in the fast-bowling department with Jhye Richardson and Kane Richardson bowling well at times in this series but the absence of their World Cup-winning trio in Hazlewood, Starc and Cummins in the final T20I loss to Sri Lanka was noteworthy, particularly in the powerplay.
Ashton Agar bowled superbly in this series after playing just one game in the T20 World Cup, having lost his place due to the balance of the team requiring seven batters. He took 3 for 47 in 12 overs and did not concede a boundary in the three games he played after missing out on selection in the first two matches. He strangled Sri Lanka's batting line-up in the middle overs. Australia have settled on the fact that they must play seven batters and this series, like the T20 World Cup, proved the value of having Matthew Wade at No. 7 instead of Agar. The spinner was oddly trialled as an opener in two games but again it was clear that it can't work as a long-term strategy. If Agar is going to be utilised in a home World Cup, where he can be a huge asset given his control, bounce, changes of pace, and ability to defend on big grounds, then he will have to play in a four-man attack. That will mean Australia will need to leave out one of their big three quicks and play two spinners, or he plays in front of Adam Zampa, which seems unlikely.
Alex Malcolm is an Associate Editor at ESPNcricinfo