Yet there would be at least 5 players off the top of my head as good as or far superior to him in the La Liga. You're obviously disregarding everything they have said, no-one is discounting how good of a playmaker he is, simply that for the money it'd cost, you'd expect him to compete with Spain's best. That being a problem in itself, as currently he just doesn't influence games (from a statistical perspective) enough. Madrid already have playmakers, Isco etc.
One of the world's best dribblers, great at getting others involved but he hasn't really gone to another level since joining Chelsea, which I expected him to. Then again, maybe joining a better team in Madrid who play a counter-attacking style will get more out of him. I've always said if he could be more lethal, he would be one of the world's best, but currently I still feel he's a level or two below.