Vaughan had earlier predicted that India will be whitewashed 4-0 in the Test series after the visitors lost the first Test in Adelaide by eight wickets.
Warner said Australia will now look to focus on their tour of South Africa to stay in the race for the WTC title.
Shastri also praised two debutants, Washington Sundar and T Natarajan, as well as Shardul Thakur.
Tim Paine had decided to review decisions for catches off Mayank Agarwal and later Navdeep Saini, both of which turned out to have missed the bat by a fair distance.
After replacing Varun Chakravarthy in India's T20I squad, Natarajan hasn't looked back.
The legendary spinner praised the stand-in Indian skipper for eking out his second century Melbourne and in conditions that favoured the bowlers.
It is understood that young Shubman Gill, after a couple of impressive knocks in the warm-up games, is seen as a replacement of Shaw as senior star Rohit Sharma will not be available until the third Test match in Sydney.
The legendary retired cricketer says that batsmen need to be extremely aware of the clock and switch on and off aggression while respecting the conditions.
Skipper Aaron Finch says he is yet to decide between Wade and Marnus Labuschange but hints he is unwilling to tinker with the in-form middle-order.
Warner is out of the remainder of the limited-over series after sustaining a groin strain during second ODI in Sydney.
Wriddhiman Saha sustained double hamstring injury during IPL and is currently with the Indian team in Australia while recuperating from the knock, KL Rahul remains first choice 'keeper in ODIs.
Only seven players, including Paine, from the previous India series have been retained for this contest. Meanwhile, the hosts look stronger with the inclusion of Smith and Warner who were dearly missed in the previous contest.
Half of the Australians featuring in the Indian Premier League playoffs have hardly played much in the T20 league.
The first Test match in Adelaide is expected to be a pink-ball Test followed by traditional Boxing Day Test on December 26.
India is scheduled to play four Tests in Australia in December-January, a series which is currently in doubt due to the COVID-19 pandemic, which has claimed over 2.5 lakh lives across the world.
Virat Kohli's on-field antics angered Justin Langer but he could not be expressive about it as Australia were recovering from the ball-tampering scandal in Cape Town.
Melbourne Cricket Ground said a person who attended the ICC Women's T20 World Cup Final at the MCG on Sunday March 8 has now been diagnosed with COVID-19.
Megan Schutt finished as the tournament's highest wicket-taker. Australia stormed to an 85-run victory over India to seal their fifth Women's T20 World Cup title.
Poonam Yadav picked four wickets for just 19 runs to put Australia on backfoot in 133-chase. Shikha Pandey was also a big hit with the ball as she scalped three wickets.
India have failed to reach the final in any of the six previous editions of the Women's World T20 but have reached the semi-finals thrice.
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