Well... it is not about changing the winning combination. I would have expected the Indians to rest some of their bowlers. What about resting two of the bowlers and including Ravichandran Ashwin and Prasidh Krishna instead? If you check Australia's last match, they did the same. For their last group stage match (against Bangladesh), they included Sean Abbott instead of Mitchell Starc. I would say that this would have been helpful, given the fact that some of the Indian bowlers have suffered from injury issues recently (such as Jasprit Bumrah).