I believe by changing the logo as well as the tune is one of the best decision made by the company
If we go back to past, we can find the same kind of response was given to Vodafone. In spite eing a new entrant nto the market,Vodafone tried and manged to get a position in the market.
Initially there was criticism regarding replacing the brand ambassador Pug and the sweet little girl, but with the passage of time Indian public appreciated the brand as well as the culture of the company.
Above case study shows that Indian public are very much flexible and adaptive when it comes to change. We people prefer change and Add gurus strike such mentality with their creative ideas.