There have been bad ball-and-strike calls since the beginnings of baseball.
These are magnified in the modern era due to high-definition television and the strike-zone box featured on many broadcasts. To be fair, that box isn’t necessarily 100 percent accurate in describing the strike zone. What it has done, though, is increase the call for an automated strike zone. MLB has enough cameras in ballparks to accomplish this goal.
What they are doing, I think, is approaching this the right way. Instead of simply instituting automated ball-and-strike calls with a system that might not be perfect, MLB is testing this system.