Tom Kelly understood how to manage a game as well or better than just about any manager ever. My perception is that his biggest shortcoming was his sometimes standoffish personality because it made it hard for him to relate to some players with the result being that he may not have gotten the most out of them. Molitor seems to have close to the understanding of the game as Kelly had but I'd guess he's much better at managing the clubhouse. If he stays in the dugout for a few more years I think his game management skills will do nothing but improve, and I agree that he seems much more willing to incorporate new approaches (defensive shifts, for example) than Kelly would have.