Silva wouldn't need to be a wide forward though. With a technically gifted midfield 3, as well as having Silva, we should able to retain possession long enough to allow Clichy or Kokarov to push up and become a midfielder (when in possession). Silva can then float between the lines and do what he does best.
So in essence, we would have a midfield 3 of Toure, Dinho and one other player, flanked by Sagna and Clichy, with Silva and De Bruyne operating behind Aguero. We double up on width in every single game yet we don't cross the ball or cut in and shoot.
As for the debate between Yaya and Sterling, it's personal preference. When he has other ball players around him, Yaya offers us much more in my opinion. And Sterling isn't good enough for us to line up with a midfield 2. There needs to be 3 in the middle in the majority of matches because otherwise we get out numbered.
As for the Liverpool game, it wasn't just about 'earning the right to play'. They were technically very clever. They double teamed Toure and stopped him from turning with the ball and they pressed our technically poorer players. We can run all day and fight all day but if you don't have the technical skills to deal with the ball under pressure, then you won't get anywhere, and this is our problem. We try and play possession based football but only about 60% of our team are comfortable with the ball under pressure. Certain players struggle to sort their feet out or require too many touches. Against Liverpool that was hugely evident.