There were many who said the same about Sane last season. I still remember reading posts like "I don't see what Sane brings to the team". Now, he is one of the first names on the teamsheet. B.Silva has started very few meaningful matches here and there and his sub appearances have been hardly 10-15 minutes. Gundogan is coming back after a long injury. Aguero has not been the same after the car accident despite playing regularly, and then we are expecting Gundogan to play well. There is also the fact that Pep's system needs time and games for players to adapt to, as we have seen with the improvement in several players this season. We need to be patient with B.Silva and Gundogan. Writing them off or even planning to replace them is too premature at this point.