The logic is this, if you dont have enough good all rounders and your bowling is a bit weak you play more batsmen so that you can chase whatever is set.
IMO Mishra is too poor with the bat to include as a bowler. We already have Munaf who is at least 8 runs minus in the field and a zero with the bat. Cant afford someone else who bats as bad or worse than Nehra/Ishant/RP.
Munaf is going to play unless Zaheer comes in.
So pacebowling option is going to be Munaf & Ishant and either Nehra/Praveen/RP
Jadeja will play till Yusuf Pathan/Praveen Kumar find batting form.
If you don't have enough good all-rounders, you're owned. Admit it. The Indians will lose the series and a 7-0 whitewash is likely. The Indians can't even chase a total slightly over 300, and we've seen it twice in a row since their return from the break, and that's despite having seven batsmen. They have more hope of chasing a total between 200 and 250, even with one man down.
Yuvi, Viru, Raina and Kohli are worse than dire with the ball. You don't play a bowler who has an average over 40 consistently. Yet we effectively see one bowling more than ten overs. Such bowling options are not options. If your bowling is so weak, why do you weaken it so much further? Man for man, each Indian bowler is competent, but put together four of them, and an absolutely hopeless part-time bunch, the bowling becomes weak.
If Mishra is 'too poor' with the bat, then there's a management issue. He's an under-rated batsman, and can get useful runs. I don't mean he's Jacques Kallis, but he can be one of a combination of run-scoring bowlers. That's a very useful investment, and with so many flat pitches to play on, they need to explore that. They can invest in Harbhajan, Mishra, Praveen and Zaheer, and look at getting back the Pathans when in form.
Munaf is a no-no in ODIs. He gives away too many runs on the field, can't catch, can't bend, can't slide or throw straight. When your best and safest fielders are so woefully out of form, they're compounding the problem with slackers like him being around. It makes no sense, as he's not that great a bowler to offset his fielding weaknesses, and on flat decks, against set batsmen, he too goes for over six an over.
If it's three seamers, it will have to be Nehra, Kumar and one of Ishant and Tyagi. I don't believe all of Munaf, Ishant, Nehra, RP, Ojha and other bowlers who can't bat, should be in the ODI squad.