The biggest problem in baseball is not the base size. It is the speed of the game, and the unnecessary interruptions. Here are my ideas.
1. Eliminate the balk rules. If the runner is deceived, too bad. Seeing a pick-off is exciting. See the pitcher throw to Votto only to him throw it back without even looking at the runner is boring,
2. Once a pitcher receives the ball from the catcher he has fifteen seconds to deliver the next pitch. ( that includes pick-off attempts. See rule one.)
3. A pitcher may deliver the next pitch immediately after receiving the ball from the catcher. Batter may not call time out. (Some batters spend more time getting dressed for the next pitch than a woman does putting on make-up.)
4. Zero mound visits. Baseball needs to enter the 21st century. Screw the signs. Have the pitches called from the dugout using technology. A wrist watch type appliance on the pitcher's wrist. Same thing for the batter/ third base coach. Fielders same thing Have a tech umpire to prevent hacking.
5. If a pitcher starts an inning he must finish it. No calling to the bullpen. If a player is hurt and time is called the player must go to the bench and go on the 7 day disabled list.
6. A foul off with two strikes is an out just like a bunt.
7. Instead of putting a man on second in extra innings load the bases. If the visiting teams scores four runs the game is over.
8. Eliminate the infield fly rule.
The game needs to move faster and be more exciting.
I don't care if the fielders shift or not. The batters need to adjust.