Peavy is dealing with a serious shoulder injury --- it does not portend well for his future. While I'd love to have him, given that the asking price would likely be MUCH MUCH greater than EE & Claussen and the injury, it problably isn't a good fit.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.