In fairness to Turco, he was signed with what, 2 weeks to go in the year? He was playing his first NHL games of the season while most guys were playing their 70th. Not surprising he was rusty as all hell.
He's a great mentor, so he probably would be good at helping a young netminder find their confidence and skill if he was their backup. Unfortunately, as others have said, his skill's sliding due to age, so probably not.
That being said, would not at all be surprised to see him as a goalie coach in the very near future.