^ That's a very aggressive bit of team selection, backing Ashwin to play at 7 and essentially giving yourself five bowling options, but it is one that Dhoni has constantly avoided. I think he and the think tank have come to the conclusion that playing five bowlers doesn't necessarily improve our chances of winning.
While I really like the way Sai's team shapes up, I'd still pick Jadeja over Ojha in unfriendly conditions. That's not to knock on Ojha's ability (I'm a big fan), but simply because Jadeja is a three-tool player as opposed to Ojha, who's purely a bowler. In unfriendly conditions, Ojha/Jadeja's job will likely be to hold up one end (Dhoni tends to use Ashwin as the more attacking spin option), and in that scenario I'd like more output from the player playing that role, which you get with Jadeja.
The selection of the extra bowler comes down to whether the management wants to pick teams to win or not to lose. In the past, our management has generally picked teams not to lose, meaning we'll get the extra batsman.