The only quibble I have with Arena's subs is that he still had one in hand against Italy. Take out one of the guys who played his heart out but was dead on his feet for some fresh legs in the last 10 minutes or so -- the Italians were vulnerable to counter-attack due to the well-executed strategy of making them run every inch of the field for the entire game. It would have been nice to have gotten a fresh midfielder in there to help control the ball and possibly get a counter-attack started.
Still, under the circumstances, a draw was an excellent result.