You might not get much value this year from Drew, Cain and Lincecum [two great pitchers who won't get much run support] but they'll be gold down the road. And if they DO happen to contribute, that's just gravy on the potatoes.
I think C is your biggest concern. Drew is gonna surprise a lot of people - his peripherals last year were good, and he has a really good minor league track record. He's way too young and talented for people to write him off already.
Ramon Hernandez scares me. Surely there are some undrafted C's you can pick up?
As of 8/4/13 C:Napoli 1B:Goldshmidt 2B:Kinsler, Gyorko SS:Tulo, Profar 3B:Longoria, Machado, Middlebrooks OF:Harper, J. Upton, AGon, R. Davis, Venable SP:Scherzer, Minor, Ryu, E.Santana, Beachy, Samardzja, J.Johnson (DL), T.Ross RP:Perez, Rodney, Farquar