Whatever this is getting confusing so let me sum it up: Signing Silva doesn't take us up a level just like signing Rooney didn't take us up a level and signing Ancelotti hasn't immediately taken us up a level (we might do if he wins stuff for us, but it is the winning that matters there, not who did it). Yes people might notice, but it isn't changing their opinion of us as a club. It isn't changing agents or players opinions when we make offers. And it isn't changing the opinions of fans who might catch on and build us as a club brand. I don't really care too much about the last part but it does lead to more money and that can make a difference for the on the field part.
So when I replied to the original post saying that we should sign Silva because it'll help us with recognition like Rooney and Carlo did, this is why I don't think that matters at all.