I don't think it would have done too much. It would be akin to blaming the 2nd ODI loss on Yuvraj and the third on Dravid. The structure of our innings sucked, and did not lend itself to making a good total.
Going into the 4th ODI, either team could have been up 3-0. Our performance in this game, so far, tells me that West Indies has dominated us, so far, and our victory in the 1st ODI could also have been the Windies hard done by. We should do better in the test matches, when we don't have to face 5 slower balls an over, and we have a classy player like Laxman back in the side. Marlon Samuels will not be nearly as effective in test cricket as he has been in this ODI series, I feel.