I know its a lot to ask, but I think we have to continue being patient with BA. As many have stated, his glove far outweighs any additional offensive output which would be gained by Mack, Pablo, or any other option.
Furthermore, many young players have a hard time adjusting to major league pitching when starting their careers. We need to look no further than Paul Konerko to see how tough the transition can be for even the best players.
In 1997-98, he averaged just over .200 and hit only 7 HR's in 81 games. It wasn't until he arrived in Chicago for the 1999 season that he begun to reach his potential.
http://sports.espn.go.com/mlb/players/stats?playerId=3747
I'm not saying that BA will ever become the player that PK is (wouldn't it be nice if does though!).....however, I can guarantee you that both the Dodgers and Reds are disappointed they didn't give this guy more of a chance.
Let's at least give Brian 2 more months to come around since we don't appear to have any viable canidates for replacement either on the roster or in the minors.
If Kenny Williams is able to perform some magic and steal an all star caliber center fielder in exchange for a polish sausage (or something similar), than by all means make the change.
But don't do it just to give up on the kid and don't rush the move when any replacement you have will hurt the team defensively.