"he just does not look like the same hitter. "
Because he isn't and that is what they are trying to do. They are trying to get him to take more pitches, be more patient and wait for his pitch. The result will be his average will go down, but his Ks, OBP, and power will go up
I will take a .280 hitter with a .350 OBP over a .300 hitter with a .330 OBP every time