You got it 100% correct, this is exactly what we are lacking. We have a pretty decent midfield, but no attacking force in it at all. Gagliardini, Vecino, Jao Mario, Valero, Brozovic and Cancelo are all fine players but none of them are the type who would go forward and attack. Their only objective, which is apparent in every single game, is to bring up the ball to the attacking line up front ---> Candreva, Perisic and Icardi. If those 3 are having a bad day then we are dead because you will never see our midfield going higher up front, initating and finishing chances.
There are rumours about a possible signing of Javier Pastore during the winter market, which would be great for us if it would happen.