Umps need to take their time calling balls and strikes. TBS, some umps over do this with the delay call driving parents/ coaches nuts. Most missed calls are unforced errors, IMO. Ump has made up his mind what he is calling before pitch crosses the plate and is fooled by offspeed movement pitches. I have seen center cut change ups called balls because blue saw as it as an up pitch and made his mind up too early. Same goes for back door CBs.
I have bever seen an ump correct a ball/strike call in real time.
I have bever seen an ump correct a ball/strike call in real time.