Nasri was great for us when he wanted to be, and he was a huge part of our title season. Peak Nasri would have thrived in a Pep team.
As for B. Silva, he is looking better and better each game. I think he knows Dave only has a year or two left in him, and we will see Bernardo phased in centrally more and more as time progresses. I also still think he is a very similar player. He is good in tight space, he rarely loses the ball and he can always find a pass. He is massively out of his comfort zone on the wings but hes still making it work. He looks a lot more promising than Gundogan IMO, although I would love to see them both come good.