People seem to confuse slow at running with slowing the play down.
Silva is definitely slow at running. But his speed of thought is so good, his pass selection is so good, his touch is so good, that he controls the tempo.
Gundogan is not only slow at running, but he's slow in his speed of thought and he so often chooses the safe, square ball that it completely slows us down.
Rodri isn't very fast at running, but at least his first thought is a forward pass, unlike Gundogan. I think Rodri will end up having a great next season.