Wouldn't a NMAS card like this work for what you're looking for? Maybe I'm confused about the goal. Here, one number sends a message to both batter and runner depending on the situation.
4-2-4: batter, don't swing at this pitch. Runner you steal.
Squares with
Bunt and run
Hit and run
Fake bunt and steal
Take and steal
Whatever other combo you want
Or
The system can make room for calling to both batter and runner, or one or the other. Hard to type in a meaningful way but the number can have a key where the second number is to the...
It's a way of life in the northern part of the country. I'll add this - the acoustics are strange. My daughter is a catcher, who's said she can barely hear the pitch call from the dugout depending on which side we're on, yet we can hear fans in the outfield talking during at bats. Every batted...