I wouldn't label Rafaela "clutch," but am fine with "good and should get better." That play he made deep in the hole was fantastic. I would keep him at SS the rest of the season and Hamilton at 2b.
If Story returns, I'd definitely play Story at 2b or SS, whatever Cora decides. Casas has surprised the heck out of me with his hitting and fielding. I regret calling him out for missing that popup near the stands.
I say again for the umpteenth time, it's the no-names on this team who are making a difference. I get to call Duran "no-name" because that's what he was when the season started. So are Wong, Abreu, Rafaela, Hamilton O'Neill, Ref, Yoshida, Gonzalez, Jansen (catcher). Also Smith, whom you praised. Even McGuire, who was devastated when he was DFA'd.
I cannot remember a Sox team or season with so many "no-names" contributing so much. Houck, Crawford, Pivetta, Bello, and Criswell are also well within the "no-names" circle.