Cora's technique didn't have to be good to see that letting 2 strikes build up on balls down the middle without offering didn't make sense. Many on the board realized the same thing, but several of the guys, especially Bogaerts seemed determined to take a lot of good pitches. That has changed this year as opposing pitchers know they may get a swing on the first pitch. From what has been said, Cora also asked Bogaerts to try to pull the ball more often and to use his size and strength to get a higher slugginng percentage. Not much has been said about the effect on the rest of the hitters, but Cora recently made a comment about JBJ finally joining the team, meaning changing his hitting technique. You have to wonder why Farrell didn't do more about obvious hitting issues?