It seems a bit pointless to try and forecast the 2015 Sox team now given that you have to assume the team is mid renovation at this point and if nothing else Cherington et al have proven that they are creative, even unpredictable, in the moves they are prepared to make. But I can't really help myself.
If we set aside for the moment any unlikely out of the box position changes (eg Betts, Pedroia, Bogaerts or Castillo to 3b does not appear in the cards right now) and try to simply inventory what the Sox have now, focusing just on the offense for the time being, I came up with the following.
C Vazquez + ?
1b Napoli
2b Pedroia
3b Holt, WMB
SS Bogaerts
LF Craig, Nava
CF Betts, Castillo, Bradley
RF Cespedes, Victorino
DH Ortiz
From this, I draw a few tentative conclusions about the status quo ante going into the off season, some of which are more obvious than others
1. We need another 1 year stop gap catcher, as discussed elsewhere, pending Swihart's arrival
2. 3b is a verging on a pressing need, as WMB has shown he has no business being in the big leagues now and Holt is better suited as a UI then a starting 3b. The plan has to be WMB is dumped (for nothing) or starts in AAA in 2015 (where? with Cecchini at 3b?). WMB becomes a ML factor only after if he proves he can be a plus, if not plus plus, offensive player in AAA. Thus, pending any major position changes from our existing players, we need to acquire a 3b to at least supplement Holt in 2015.
3. We have 7 options for 5 OF spots:
a. It is hard to imagine Bradley having any plausible claim on a MLB job with the Sox before June 2015. Like WMB, he will have to prove again at AAA that he is not a complete black hole offensively. Until then he is no more than a fine candidate to be a great 4th/5th OFer on a team that doesn't need one. Given his current rock bottom valuation, he doesn't seem like a plausible trade chip.
b. That leaves 6. 2 of them (Craig and Victorino) you probably could not give away now, but if not dealt will expect/demand regular playing time if they are not injured. I expect both will be in the "best shape of their career" at Fort Myers in March. Both, Craig especially, could be exactly what the team needs or a major detriment to the 2015 team, no one knows. Another (Nava) appears to be a more or less fungible mediocrity, but has the rare ability on this team to bat left-handed. Another (Cespedes) is a useful B/B+ player, signed reasonably for only one more year, and thus has some trade value, but is the only one of the 6 you could confidently predict will be a better than average ML player next year. The other two (Betts and Castillo) are prospects. Betts looks like a potential super star you might want to build a team around. He is the one guy everyone will want in a trade, who you don't want to trade. Castillo is little more than a massive question mark but one that the team has invested hugely in and is untradeable, one presumes.
In sum, for various reasons none of Victorino, Craig, Nava or Cespedes or Castillo seem to make sense as trade targets. I cant see Betts being sent down in April 2015 after what he done at the bat in his limited ML playing time.
That leaves Castillo presumptively without a chair at the beginning of 2015. And I think that makes sense. I would like to see Rusney prove he can hit AAA pitching before the Sox anoint him the starting CF or RF. I wonder if the Sox will be able to resist giving him a big league gig in Spring 2015 given the money they just gave him.
If Rusney is the odd man out to start, the 2015 OF would look like:
LF: Craig/Nava
CF: Betts
RF: Cespedes/Victorino
This is premised on a Sox conclusion that Betts is a legit ML defensive CFer, which I am not sure of yet.