Cummins deserves it, could have been given to Pant as well. The thing is none of the Indian players bar Pujara and Rahane played all 4 tests and FC rightly pointed out that it was a super team effort with everyone pitching in at some point or the other instead of one dominating the entire series.
How many times did AUS take 20 wickets? The fact they even got close was due to this guy. IND cycled through a bunch of their bowlers in pursuit of these wickets. Cummins bowled north of 150 overs and his pace and wicket taking efficacy was phenomenal.