I just dislike that people so strongly believe the "guy is on a bad team he isn't and MVP" argument but then give it to a guy who helps the team win by 6 instead of 4. The Red Sox would still be winning and would still certainly be a wild card/divisional contender without Gonzalez. Where would the Rangers be without Kinsler or the Indians be without Cabrera?
If you are going to argue that only playoff teams can have MVPs, then I think you have to start looking only at teams that would not be in the playoffs without those players, since your argument lies in their "value" to a winner.