I wouldn't blame Rakitic though for this game. He's playing in all sorts of positions and doing pretty much everything but what he should be doing. And that's not because of him, but because of the tactics at display. Rakitic is very often playing very close to the line. That's not how a CM in a midfield trio should play.
Can someone tell me what Busquets brings to the team?
You mean now, or in general? Because in general, his contribution is so great that I'd actually think less of you for not understanding his role by now.