Rollins, Utley, Howard, Burrell, Feliz & the platoon twins are more important in terms of run production.
The reason he bats second in the lineup is because of his speed. If Rollins doesn't get on base, then he might, but let's not anoint him as a legitimate #2 hitter, because he isn't. He's a .275 singles hitter who doesn't walk nearly enough with no power to speak of.