Nunez is a jack of all trade but a master of none. They should limit him one or at the most two position and let him have consistency in mastering it. I wonder if his defensive errors are more so at Yankee Stadium? If that is the case perhaps the pressure of playing home trying extra hard not to make errors might indeed cause him to make more.
At least he was willing to try to play other positions. A selfish player would have likely refused. Let's give him some slack.
I happen to believe they do him a disservice moving him all over the place. As I said...limit him to a couple of positions at the most and let him master it. You want the guy to build confidence in getting the job done well. Repetitive movements creates muscle memory...after a while you just react without thinking too much. Being shifted to so many positions, it's hard to formulate muscle memory.
It would be best to limit him. He takes a beating here...