His errors don't cost games though like SBW and are more than offset by his point scoring. He kept the Lions in the game in last 2 tests. Without him NZ would have won.
He came up out of the line to confront no one resulting in Barretts try. He threw an intercept that could easily have led to another. He gave up penalties for high tackles too. You only didn't notice because the circle jerk for Sky seemed oblivious to Farrells contribution in the game.
Credit where its due for the kick. He is a brilliant man to have in those situations.