@HardRightEdge That was a lot of work and I applaud you.
I don't think they need to extend any of their current impending free agents. I love Burnett, but I do not favor giving new money to a 29 year old SS with 8 seasons on his body. Quinton Dial I would like to keep, but he should be affordable.
They need to decide who goes between Nelson and Cobb and cut that player. That's cold, but it needs to happen in my opinion. I guess theoretically they could just bite the bullet with three big receiver cap hits in one season, but cutting one would be an easy way to free up cap space. I am more attached to Nelson because of how much more he lived up to his last extension, but Cobb seems like the smarter "keep" at this point in his career.
I would not renegotiate and extend anyone other than Cobb, and that only in the case that he's taking a pay cut. I have no interest in committing more years of guaranteed money to a 33 year old Nelson or a 32 year old Matthews.
But personally, I do not think they should go hunting for the giant free agents. Free agency is about supplementing your roster and finding value-- not building your roster and paying for guys at their peaks. Gutekunst's approach should not be to fall in the ditch on the other side of the road from Thompson's usual strategy.