I didn't see the RF-1B play as it happened, but by any chance did Casas miss the tag?
The discussion on the benefits or not of coaching and training mid level players is interesting. You can't however, teach baseball instincts and inherent smarts . You cannot coach dumb to not so bright.
No matter what the SOX do this year this will be Cora's last season as manager. He's pretty much made it clear he wants to work in some team's FO.
Not only that but it points out the utter folly of trying to teach fundamentals in the ML's. Suppose you have a guy that simply defies instruction. Now what? You have a guy taking a spot on your ML roster that is NEVER going to be a ML player.
But of course modern computer geekery says everybody can play everywhere. The usual result of that thinking is that nobody can play anywhere.