It’s tricky to write about batted ball mix changes, for the most part. If you’re talking push and pull, adding the ability to go the other way can increase your batting average, sure. But it can also decrease your power output. Ground balls and fly balls act the same way — there’s really an ideal mix for each hitter, and we’re trying to figure out just as much as they are which is the best way forward.
There’s one batted ball type that just plain sucks, though. The pop-up. The infield fly.
98.5% of the time, that’s an out. It’s a bad idea, plain and simple.