David Silva has always been understated. His genius is in finding space for himself and others and the interchanges. Sane became world class playing with Silva with their amazing interchanges.
He has looked worse because he has lost all the main left sided players for all or a significant part of the season: Delph, Laporte, Sane, Rodri, Zinchenko and Mendy. We have had further problems at CB as well as the usual injuries in other positions. The team has been unbalanced and lacking the instinctive positioning and penetration of previous seasons.
No doubt David is slowing but he should be able to rely on others to work for him. He is being made to appear worse than he is.
I am a fan of Phil Foden but it is just as wrong to push him too much when so young as to prematurely write of David Silva. We need both this season.