Just looked through the 2018 rulebook and only see one major change that jumps out at me. Pitchers are now allowed to use any glove they'd like along with Catchers and First Basemen. Inning ending and OE for homeruns in Women's and Mixed E, previously was just inning ending. Over the limit homeruns in Women's C and D is now inning ending, previously was just an out. Two warm up pitches down from three. OE players can now coach bases A ball is awarded to the batter if the catcher throws the ball to anyone except the pitcher during a dead ball. The UIC can change umpires during a game. This is begging to be abused by a few teams. No cameras on the field, including umpires.