I don't know if Baldelli is or will be a hero, but I'm OK with him pulling starters the way he has been. So many times I've watched a starter cruise through the lineup once or twice and I get all excited about what a great game he's having, and then it falls apart in the later innings. So many times (and this is after the fact) I've complained that the manager left him in one inning too long. If only he had pulled him earlier the pitcher would still have a sparkling ERA and the team would still be in the game. As I said, this is after the fact. But this is where a great manager comes in. He "knows" or should know, how the rhythm of the game is changing, how strong his pitcher is, how rested the BP is, and a slew of other factors. A great manager has great judgement and consistently makes the right decisions. This is a hard job because he doesn't have a crystal ball. If he knew a reliever was going to come in and blow the game he wouldn't have made that decision. But removing the starter may have still been the right thing to do.
As far as other managerial decisions - starting line up, batting order, if and when to steal, bunt, hit and run, I'm seeing a very conservative manager, which may be due to the roster and playing the hand you have, but the lack of "small ball" tactics makes for a boring game and seems (to me) to suggest a lack of imagination and aggressiveness by the manager.
So, is Baldelli a hero or a villain? In some ways he is doing fine, and in some ways he needs improvement. Same could be said for each of us. It's been said that winning solves all problems. If the Twins become champs, (because of or in spite of Baldelli) he will be a hero. Time will tell