I was have been pondering the Walker as cleanup for a bit now and cannot wrap my arms around it. I feel like he would be better served in the 3 hole and we should throw Pedro into cleanup (Might as well get comfy where he belongs, not at 6th). I know he has struggled, but he is notoriously a slow starter and seems to be getting the swing of things. 
My optimal line today would be as follows;

McCutchen

Tabata

Walker

Alvarez

Overbay

Snyder/ Doumit

Jones/Dias

Cedeno

Pitcher.

I feel like with Alvarez would be protected either side and would see more pitches. The first three spend all day on base, and Overbay is a solid clutch batter to follow. Then some sporadic power to finish. Thoughts? 

Also I am pleased with the Pirates so far, just wish for some offensive consistency.

Go Buccos Go!