Vijay had a bit of a go and Raina came in early, which suggests they were interested; just didn't turn out to be that interested. With the time they had, they needed to either score consistently or build up to a lot of boundary hitting and by not taking the last 15, they obviously opted against it. Maybe Kohli could have gone in at 3 to pick up some singles, or even Harbhajan. Ultimately though it would just have been Dhoni throwing things out there, with no guarantee of effort and when he already had the series in his pocket. Most of the innings was just Dravid not really scoring. If the bull was to be taken by the horns, it really had to be he of the middle, not so much his captain in the pavilion.
Alarmingly, that was the West Indies' best innings and match aggregate in 8 months and the longest they've batted in a game since Adelaide, more than a year and a half ago. In both counts, the key player was Gayle.