I'm not one to tinker too much with the game, but if I were commish, czar, and supreme baseball deity all rolled up into one, I'd mandate the following changes:
1. Eliminate the fake-to-third-turn-to-first move by the pitcher. I've seen this work once, though it's done thousands of times and elicits boos every time from home fans (even if it's the home pitcher doing it). It's a stupid play, it should be a balk (its intention is to deceive the runner, which is the definition of "balk") and it looks plain foolish.