I watched from just before the penalty. I'd say he gave 3 or 4 stray passes, although to be fair sometimes the movement in front of him wasn't great. It's fair to say that he's the one player in the defence they look to to move the ball forward. He also came for at least a couple of long passes high up the pitch and lost his duel. I think his positioning was generally good and he showed a decent turn of pace at one point. But yeah, if I'd only ever seen that performance, I wouldn't think I was looking at a world class CB.
To be fair I've seen Kompany have plenty of similar games with the ball.