I am hearing a whole lot about taking a huge loss of Wells so that we can pick up more players, so I thought I might offer some of my insight into the situation.
The reason we didn't go to the playoffs last year is NOT because of a huge piece. It was because Trout missed a month with injury, Pujols adjustment, Wilson/Santana/Haren struggles, and the lack of a good arm in the bullpen.
Trout is here for the whole season, Pujols is adjusted, Wilson will perform, the the rotation/bullpen are question marks but look upgraded to me. Hamilton is icing on the cake in terms of production.
Which brings me back to Wells. We don't need another player, and Wells is not just dead weight. In his last season, he knocked out nearly 20 homers in part time play. That is a luxury to us, but most teams would welcome it. We need him for depth, and no other players (Thome, Hafner, etc) would be a better DH than Wells.
Just saying, other than pitching this team should be done with adding players.