DeJesus is much better at getting on base. Campana is better at running around them once he's on. Barney is better at preventing the opponent from getting on base with his defense. Cardenas make the most solid contact. If they were somehow melded into one super player with all the benefits of each and none of the drawbacks, I'd be all for leading off with 25 year old phenom Darian CampJesus, but such a player doesn't exist on the roster. In the mean time, they all play different positions, and since DeJesus's best asset is most beneficial at the top of the order and isn't keeping anyone else from playing, he's best served to just stay there.