Silva is great for a lot of reasons, except one...That sudden 'turn a match on it's head' skill set that only a handful of players have in the world...Ribery has that
Question really would be, would that one thing really be needed on a side that already has several like that?
I think, in the end, the fact that Ribery gave many indications that the Spanish capital was his desired destination I can't see the point of choosing a player like that over a player who would wear the kit proudly, like Silva would