I don't think this is the "draft for OL." Prior to this season, we spent 2 first round picks on OT. Yes, Buluga was horrible in the first half against Seattle and has had some other bad moments, but other than that, he was solid this year. We don't know what we have in Sherrod, but we spent a first round pick on him, so there has to be something we like about him. When Lang gets moved back to LG, we have our guards pretty much set. While I don't think Lang and Sitton are elite, they aren't terrible either. Newhouse can actually be a very good backup OT at both positions. I also still think EDS can play center.
I do think we'll draft a few OL, but I'm not sure I'd spend a whole ton of picks on the line. Plus the worst we'll finish (barring another major injury) is probably 9-7, which puts us at best around the 20 pick. There probably won't be a better option at LT sitting their than Sherrod anyway. So really, we either need a starting center (if you don't like EDS there) or a pretty solid backup interior lineman.
I know that was probably a sloppy, unoraganized mess of thoughts there, but ultimately what I'm getting at is if we get everyone healthy, I don't really think OL is a major priority in the draft. Sherrod/Newhouse, Lang, EDS/Saturday, Sitton, Buluga is probably the best we are going to do next year anyway, even if we dedicate this draft to OL since there usually aren't immediate nfl ready tackles sitting around in the 20s. The only other area that can probably be upgraded is center.