I don't know know if I'd hit Nunez for Posada just yet. I think we need to give Jorge more time. Remember, this is his first go round at DH and it's quite a bit different from catching where you're involved with each pitch. It's gotta be killing him.
I also don't think you move Jeter yet. Sure, if the Yanks had a bona fide top 1-2 hitter you'd think about it but they don't. I'd give him a longer leash and see if he can somehow come out of it.