How do you accomplish that though? Here are a few ideas I have seen:
1. Move the mound back or lower the mound. IMO this is a bad idea because it would just make velocity training even more important. It might decreased K's though, at the cost of a lot of crafty pitchers being able to even survive. You'd get a lot more mindless velocity guys in the game.
2. Deaden the ball so that hitters no longer prioritize home run swinging. Make it dead to the point that players with average power just cannot and do not hit 20 homers anymore. These guys would then perhaps change their approaches and try to be .300 hitters again.
3. Robotic umpires calling a strict strike zone. This would eliminate any pitcher's calls. This would perhaps increase BIP only if it is correct right now that the non-rule book strikezone benefits pitchers more than hitters (not clear if this is true).
4. Make a walk worth two bases. This is Josh Donaldson's favourite idea, lol. It would certainly force pitchers to throw strikes.
5. Alter the ball to reduce spin rates.
6. Allow the hitter to attempt to run to first on any pitch that gets by the catcher, no matter the count.