We have that player Gundagun, he is pure class on the ball not many better than him. His pass & retrieve is pure quality, him with Kroos & Dino would be heaven.
I think Gundagun comes in for Dino, then Dino takes a fullback roll, especially with the full backs tucking in like they appear to be.
Gundogan isn't the type of player to do Fernandinho's role in between the CB's, he's not defensive enough, that's why his best play for Dortmund came next to Weigl doing the defensive stuff. He's the kind of player who would replace Silva.