yeah it is attacking but with emerson and blasi in the middle, i think the team can get away with it. and zambrotta has improved a lot and if he did take the right side, he wouldnt have to take the whole wing like he does now on the left. nedved naturally drifts into the middle and that allows zambrotta the whole wing to attack on. if olivera played on the right, zambro wouldnt have to attack as much which could mean he would help out in defending a lot more.
anyway, if bonera was to join, it would be the better option overall.