The hitting coach needs to drag him into the video room. Even if they are not going to work on mechanical flaws, it could do nothing but help if the video drills into his mind pitching patterns and tendencies of pitchers who they will be facing.
I remember a story that Hawk told about Yaz after Hawk arrived in Boston in 1967. The Sox were facing the A’s (Hawk’s former team). They A’s brought in a reliever to face Yaz. Yaz walked over to Hawk and asked him what the pitcher had. Hawk stammered that he had a good fastball. Yaz kept staring at him waiting for more. I think he said “I need more than that”. He wanted to know about the movement, where he liked to locate etc. Hawk was intimidated. In telling the story, Hawk said that he knew right then that had wasn’t going to be very good. He was a see the ball hit the ball guy, and Yaz’s approach was on an entirely different level. Hawk was right. He had 2 years of very good productivity and then he fell off a cliff and took up golfing.
Bradley had better find a better way to approach making adjustments (not just mechanical but in mental approach) if he wants to stay as an MLB starter.