McCullum batted well, but has a major deficiency that the English should exploit.
He has trouble defending the short-ball that is on off-stump or just outside; anything wider he'll throw the kitchen sink at. He also looks unconvincing when he tries to pull the ball in front of square, and has been dismissed a few times in ODIs because of this (caught in front of square). He's extremely short and pace can trouble him when playing this shot, with the ball hitting the splice of his bat (I'd place a fielder at midwicket on the edge of the circle for the catch).
2 slips, gully, point, thirdman, cover, mid-off, mid-wicket, and fine leg for McCullum's field. Perhaps osmeone can be put in short-leg too, taking out gully.
England should pepper him with short fast straight bowling, same with Richardson.