While there is no clear evidence that gameplay was significantly changed due to Performance Enhancing Drugs (PEDs), the analytics revolution headlined by Moneyball has continued to change the game towards power. Both hitting (hitting fly balls far as the core strategy, accepting increased strikeouts which used to be "embarassing") and pitching ("pitch labs", where the average velocity has significantly increased with harder to hit pitches) were impacted.
Basically, the benefit of a homerun and the benefit of a strikeout were both better understood and so the balance of the game changed so those were more common outcomes.
Basically, the benefit of a homerun and the benefit of a strikeout were both better understood and so the balance of the game changed so those were more common outcomes.