Sixteen million a year, though? There's plenty of solid guards in this class. A couple of solid centers as well. Do you really spend sixteen-million-per-year on Dotson?
And you have to worry about a fluke year. It took a trade to us to get him to do well. Yes, he did better at right guard than tackle, but that's still a right guard. The easiest position on the O-line to replace. And you think spending the market rate - and yes, sixteen million is the market rate (according to Sportrac, unless, of course, you get him for less because LA?) is prudent?
Mind you, I wouldn't be upset if they spent that for Dotson and it turned out great, but you're still assuming a pretty big risk for a big cap hit.
EDIT: Apologies if I came off as harsh, Dieter. I just don't know if you spend that much on an interior lineman who just had a career year in his contract year.