Here's the thing though, if you look at the offense (second in runs scored), it is pretty elite. That's without full seasons of Crawford, Ellsbury and under performing guys like Gonzalez and Pedroia. I think all those guys back next year keeps this an elite group.
Bullpen also is pretty good, 3.38 ERA and has been even better than that since the awful start. Bailey will be an elite piece to add and any number of AAA guys could be impact pitchers also. I think we're ok here too.
The problem has been Beckett and Lester. They are supposed to be your top guys and give you a chance to win the majority of games. The team is a pathetic 16-27 in their starts. On the other hand all the other pitchers (Buchholz, Cook, Morales, Doubront, etc) have combined for 41-32 which is good out of the back end of your rotation. If the team goes just .500 in Beckett/Lester starts then we are in a wildcard spot.
I think adding Johnson, who will pitch innings and keep us in ball games, and counting on a Lester resurgance will make us a winning team.
The Yankees are 27-16 in Sabathia/Kuroda starts, if those guys were as bad as Lester/Beckett the Yankees would have the same record as us.
Bottom line you need your top two guys to win games. I think we can count on Lester to potentially do that, I think the 2nd piece is what we need to find.
EDIT: Also, for 2011 up until September, the team went 35-17 in Beckett/Lester starts and as a result the team was a run-away favorite. That's the kind of production you need out of your 1/2 slot