Dhoni retired from tests in 2015. India starts using it later in 2016.
I'm pretty sure I read India did not trust DRS and it required both participating nations to agree to its use (don't know if still the case, but absurd to have some use DRS and some not)
Might have been a Dhoni influence or simply India got used to the idea, I would think with the amount of turn in India their spinners would prefer to have DRS on decisions when an umpire is being asked to judge turn (hit or not hit stumps), and indeed those little nicks
swings and roundabouts I guess, could have been an element of wanting to make sure they got the better of right and wrong decisions and maybe felt DRS might help the opposition more, especially if not trusting it based on a few decisions
I'm more concerned that it is in the hands of the batsmen/fielding side, would like to see all wrong decisions righted not just where the batsman or fielding side review it. Has always felt to me like a bit of a punt in a lot of them, I would like to see the stats year on year and maybe even by country of reviews and non-reviews vs correct and (would have been) overturned decisions
The Broad incident sticks in the throat for some, I have no issue with him not "walking" as the aussies have made plenty of noise on the issue of whether you should or not (laws don't state you are only out IF the umpire gives it, if you know you are out then to not walk is essentially cheating, asking the opponents to review if they can and trying to force an umpiring/decision error), but the bottom line is if the aussies used up their reviews then that's their own fault - for me the bigger fault in it all, giving fielding side reviews
Is Smith better off than Ponting as he has reviews to save his neck? Well could argue reviews can also sink you where you might have got away with it before DRS so swings and roundabouts