I’m not opposed either, but someone is going to have to explain the details to me. The strike zone should change by different players and batting stances. A tall guy crouching down in his stance might have the same zone as a short guy standing up in his stance, but if both use the same stance the tall guy should have the bigger zone.
Freegards
Not sure how it works but they’ve been doing it in Cricket (At least that’s what I was told) for a while now.
Perhaps a thermal camera of some kind?