juve played something bewteen 4-4-2 and 4-3-3 with marchisio beeing the left midfielder.
he adds defensively more then pepe, and is more polished in going forward.
yes, he is better there then pepe
also, del neri dont want to play aquaman at cost of marchisio, so he lets them all (melo,aqua,marchi) play
so far that went pretty well