On Paper...
This team still has a ton of question marks, especially for the pitching:
Lackey - he wasn't very good last year, especially against the Yankees.
Becket - his 2007 season is in the very distant past. Since then he's been a completely different pitcher. Who's to say he'll become dominant again. Anyways, he's never been dominant against the yankees sans a few outliers.
Dice-K : Do I even need to say anything?
Buchholz: While I think he will have a bright future, he's still has a lot to prove. A regression to an average pitcher wouldn't shock me (not saying I'm expecting that).
Pappelbon: The closer who has gotten progressively worse year after year.
Bard: Still has a lot to prove and needs improvement with location.
Everybody else is a collection of has beens, hopefullys, or never was. I hope they can get solid work from Jenks, Wheeler, and one other, but who knows.
As for the lineup, Pedroia and Youk are both coming off injuries. JD Drew is getting older and can't hit lefties. Cameron is old and coming off injuries. Ellsbury is coming off an injury and is still relatively unproven. The catcher position is a disaster and I highly doubt Scutaro can put up another career year. And Ortiz isn't getting any younger. Now, that being said, I do think this offense has amazing potential. I do think Pedroia and Youk will be fine. I do think Ortiz will still get 25+ bombs. But the rest are question marks (of course not Gonzo...)
Our starting rotation is incredibly over-rated.