I view EDS similarly to Bakhtiari in one respect. These guys look good only in comparison to the guys they replaced...Saturday and Newhouse respectively. Bhaktiari gets the rookie benefit of the doubt.
Saturday was incapable of getting to the second level and making a block by the time we got him, one reason the 2012 running game was ineffective. EDS can get out there, if not always apace, but he frequently chips or whiffs. The guy is serviceable, nothing more or less. He is not Scott Wells and will not command anything like Wells money, so he might be back, but I'd not consider him a priority, especially in comparison to Shields.
I would not take Lacy's season as a sign of significant improvement in run blocking over 2012. His yards after contact were ungodly high.
I could see moving Lang to C and Barclay to RG. I can see Barclay excelling at that position where he doesn't need to account for the edge. Tretter at C is a possibility with Barclay staying at RT and Bulaga at LT, but that leaves Bhaktiari on the bench. Bottom line, with Bulaga returning, who should moved out of the line as the weakest link? I'd have to say EDS.