I haven't been a big Murphy fan, simply because I'm a strong believer in good defense, especially up the middle. No doubt the guy can hit, but I always doubted that he'd ever become very good with the glove -- at any position.
It's still early, double-plays are still a bit of an adventure, and no one will ever say that he has tremendous range at second. That said, I agree that he seems like he's settling in, and could eventually evolve into a steady, if unspectacular, second baseman.
More than happy to be proven wrong. I also agree that -- for now, at least -- second base is not the Mets' biggest worry.