Dude, it's not that it's "outside the norm". It's that it's a knee jerk response from armchair fans that you'd find on Yahoo comments.
First off, it's highly unlikely that Joe Thomas fixes the fact that our Defense gives up roughly 17, 468 yards per game to any QB not named Cutler. Joe Thomas doesn't fix the fact that our center and the entire left side of the line has sucked donkey balls. Joe Thomas is 30, and makes 11.5M a year. Joe Thomas doesn't fix that fact that DickRod is slower than everyone in the NFL.
Secondly, AR has succeeded with a less than elite LT for the past 7 years. They have hit a rough patch sure, and I think it's FAR more to do with WRs not getting open and a piss poor gameplan.
Finally - no one traded for him. What does this tell you? A Failure by TT, or he wasn't really available at anything close to a price anyone was willing to pay?
You are a bright guy, and have posted a ton of great stuff, but saying trade 3 1st rounders for a 30 year old OL is silly reaction to 2 straight losses vs good defenses.
Trading what would be required, plus the salary cap implications, plus the fact that no one else traded for him should tell you everything. I do think TT is open for questioning on things. Saying trade a 5th or 6th rounder for Vernon Davis we can debate, hell, I'd agree with those on this one that I think TT could have upgraded this area, but this 3 1st rounders for a LT is lunacy. Sorry, but it is.