I think you nailed it. Ultimately current batters are strong enough to hit balls out of the current parks whenever they make really solid contact. So the park needs to be bigger, the ball deader, the bat deader, or making solid contact more difficult. But if we want the ball in play, baserunners, etc., making solid contact can’t be made more difficult.
Another angle is to incentivize putting the ball in play over waiting for “your pitch” to hit. As good as modern fielding is, that may just result in a lot of put-outs at first, which wouldn’t be progress.
Trying to alter the strike zone, the number of balls and strikes, the treatment of fouls, etc., is tough because a) the granularity is too high, and b) it’s tough to invent something that’s not even more subject to gamesmanship than the current set-up.
As a wild idea with only a few seconds’ thought behind it, what if a non-swinging strike counted as 2 strikes? Or increase the strike zone a lot, so there’s a lot more of a goal-tending POV for hitters; your goal is to keep it out of the catcher’s glove, not necessarily to hit it deep.
Shrinking the basepaths would decrease the speed advantage of a thrown ball over the runners running.
Pretty quick it stops looking much like current baseball though. As a comparison, arena football is non-stop entertaining, but it sure ain’t “real” football.
Ultimately I suppose the answer is today’s vastly better, faster, quicker, stronger athletes simply need a larger field of play. They’ve simply outgrown the fields they have. Widen the fair ground from 90 degrees to 120 degrees. Deepen it to 450 feet down the foul lines and 550 feet to center. That will restore the game to the dynamics of the 1930s, but with a lot less goofs.
Play Ball!
