Any theories as to what's up with the Braves' offseason?

I've never seen an offseason like this under AA. We've let multiple key performers and pieces of our clubhouse culture walk without making any effort to keep them (Charlie said he never even got a call). We haven't signed any of the second-tier FAs—hell, we haven't even really signed any of the third-tier (why not take a $7M bet on Paul Sewald, for example?). We haven't made any impact trades, and it's largely been crickets from the FO all winter. So what gives?