The rotation policy. I am actually surprised that the Aussies agreed to play in these locations. Last time round, England did raise some objections about the locations.
Secondly, the matches should have been held either in the East or North seeing as the Western part of India is reeling under heavy rains.
Third, the 1st ODI should have been a day-night affair,cause Kochi has floodlights. Also, if there was no play possible in the morning, a T20 could have been organised in the evening as well.