I don't want to belabor this discussion, but I think you have just made the case FOR having automated balls and strikes. It's not an easy job. And anything that helps the umpire get the call correct should be employed. But I can't imagine automating out calls on the bases. There are just too many variables unless you had some kind of sensors on the players, the bases, and the ball/glove (perhaps something like fencing?). I'd do it just for balls and strikes, and just as advice for the human umpire, who could deal with unusual situations that the automated system did not anticipate.