I'm not sure Zat. I'm pretty torn on the whole midfield at the moment.
I really do think we need a big, physical presence to come in, and primarily that player to be the '8' in Silva's 4-3-3. However, I also think we need someone who can put their foot on the ball from deep and knock it about.
It looks like Schneiderlin is going to be given the chance to play that role which is fine, but if he's not up to scratch / can't be bothered, then we're in the same position as we were this year. It's why I was an advocate of Carvalho. He's a player which can cover both the deep-lying playmaker and big physical presence that we need.
If Schneiderlin can indeed cut it, then I think the priority can be shifted to a playmaker in the Ziyech/Ozyakup mode who can get on the ball and carry it forward or pick a pass. While he wouldn't be my first option, Wilshere could even be an option for this role.
So in that system, I think they could be the '8' and Gylfi the '10', but both kind of interchanging and having the freedom to roam.
Gueye also has to be factored in. I think he's a better option than Schneiderlin for the 'screener' in front of the defence as in that role he is excellent, but he lacks the passing range or skill on the ball to then take us forward, so again we'd need a player to drop deep and pick the ball up from the defence.
I don't think Gylfi would be best used there, and we don't have that type of player (if Rooney goes definitely), so we'd need to bring someone in. Issue then is if that's somebody like a Ziyech or Ozyakup, we're left with having no height or power in a position where it's very easily to get overrun in the Premier League.
My ideal signing would be Doucoure.
While he isn't brilliant on the ball, he's better than Gana and would be a really good folly for whoever plays the screening role. He's able to drive forward at pace and that's when we could get Gylfi on the ball in higher positions, and it would also add that power/physicality we lack in the middle.
Zakaria could be another option that I think would be getable, but he is more like a Carvalho in terms of style than a traditional box-to-box player like Doucoure when I've seen him play.