I know I am in the minority but I still believe Devers can and will be a gold glove outstanding defensive third baseman.
If you look carefully at all his errors they are mostly mental not physical ones. They either stem from his trying to do too much or rushing throws.
Yesterday's error on the possible double play was a typical case. He rushed his attempt to throw the ball before he had a grip on the ball, causing him to drop the ball.
Finally, I don't like the alignment Cora's uses on that shift. I prefer the alignment where the third baseman move to the right side of second and the shortstop remains on the left side. That way only one man is out of position not two.