I agree with you that neither team NEEDS to make a trade.
IMO, which I fully admit might be clouded by Jacko-like bias, is that the Sox are good to go as is, even for the playoff run. That's provided that they stay healthy, of course. I could see adding a reliever. I can understand why people think we need an upgrade at 2B, but I think we're fine there. I completely disagree with you about the Sox needing a catcher.
I really think the Yankees' need for a starter is greater than any of our needs, with the word 'need' being used lightly. Both teams would make the playoffs even if they stand pat.