It is difficult, on balance, to crucify Langer for sticking with the bowling attack. At Adelaide the same bowling attack got India out for their smallest total in history. Hindsight is 20/20, and the bowling unit failed on day 5 at Sydney and Bris, but on the back of Adelaide realistically almost no coach would have dropped any of the bowlers other than for an injury.
Proof that Langer is willing to change things can be seen in the batting lineup. Changes were made throughout the series, and not just because of injury.
I'm not specifically defending him, just saying that in trying to take a big picture view, with Adelaide in context, it is hard to be too critical.
To me the main difference between the teams is that just about all of the players that India brought in as the series went on produced, and some of them did so to a degree that won matches, or saved them. None of the players Australia either brought in (Pucovski, Warner, Harris, Green) or moved within the team (Wade) produced to anything like that. And though we will never know for sure, I have very little confidence that any of our second stringers would have come in and made the kind of difference that India's second stringers did.
I'm with
@Mr 95% though, as much as I hated to see Aus fail at the Gabba, it was a moment of history, and the Indian team that achieved it deserves its moment in the sun.