If Shaw stays on trajectory I would not be the least bit surprised if he's starting at 3B around or after the ASB. It's more aggressive than usual for the Cubs, but they appear to be balls out right now (get your mind out of the gutter, I'm talking about a steam engine). Madrigal might start, but at some point in the cold spring, he's going to have a leg issue.
Also, LOL, Madrigal's noodle arm and windup throw to third preclude him from any consideration for a gold glove. He's not a 3rd baseman.