The sox need some new blood, IMO and I think a lot of people would agree. The question is, where do you add it? Look at your positions as of right now.
C- VMart - signed through 2010
1B- Youkilis- signed through 2013 (if you consider his option)
2B- Pedroia- signed though 2014
SS- Lowrie/Green- arb case/FA
3B- Lowell- signed through 2010
LF- OPEN
CF- Ellsbury- arb case
RF- signed through 2011
DH- Ortiz- signed through 2010
Backup C's-
Varitek likely to accept player option
Kottaras
Offensive FAs- Bay and Gonzalez
#1- Beckett- under control through 2010
#2- Lester- signed through 2013
#3- DiceK- signed through 2012
#4- Buchholz- under team control through 2013
#5- Wakefield- if option picked up
The bullpen will likely be unchanged to a large degree since all are under team control e/c for Wagner
So, you say you want to improve them offensively. Well, that also takes into account defense.
LF:
By losing Bay, you essentially lose the best offensive player on the FA market, so anyone aside from Bay (or Holliday as both are similar) is a downgrade. I bet they sign one of the two, IMO. If they do not, then they will likely be looking at guys like Hideki Matsui, Johnny Damon, Bobby Abreu and others of their ilk for LF in Fenway.
SS:
By losing AGon, the sox lose something that most people dont point out. The sox defense went from one of the worst in the AL to the best defense (FP wise) in the AL after acquiring AGon. But what are the other options? Do you go with OCab? How about Tejada? OCab doesnt give you much offensively and he's gone off a cliff this season defensively (per UZR), so AGon sounds like the better option. Tejada gives you more offense, but his defense has been awful of late. Do you sign a guy like Vizquel as a mentor to Lowrie and hope the two can help groom Jed into a good SS? Lots of questions, but status quo might be the best option.
So, in terms of the two glaring holes created by contract expirations, the sox are likely to be better off just resigning those guys. If you are thinking about a good catcher and want to shuffle around Youk and Lowell, then look to trade. Cause the C market sucks.
Therefore, a trade seems the most likely. The sox dont have a lot of answers outside of their org on the FA market to fill their holes, and the other spots are filled with guys under control.
In terms of the starters, I see Wakefield getting surgery in the next few weeks for his back, then making a decision if he wants to come back. There is the one big fish out there in Lackey, but do the sox make that commitment with Beckett's contract expiring soon? Might be a better idea to just sign Beckett long term if Lackey is their idea. But if they decide to make a deal, then obviously all bets are off. They might actually be better off signing Beckett to a 5 yr deal or so, taking Wakefields option regardless of his outcome and signing a 1 yr deal with a guy like Randy Wolf.
Regardless, I could see a lot of status quo based upon the options available. But if they get creative, there might be some big changes via trade