In baseball for some reason, erratic umpiring is a *feature*, not a bug. Back in the day when NL home plate umps used the internal chest protector before the AL who still held the big balloon sofa cushions for protection (through 1976?), the NL umps were able to squat and see lower and so a generally lower strike zone was called and accepted in the NL than in the AL. Even today with standardized equipment, the differences in strike zones per each MLB ump, or how close each ump calls the vicinity force-out play at 2nd base, etc.. is almost celebrated as one of the quirky but accepted things in baseball, rather than something to correct and standardize. So ya, not something we want to see replicated in hockey.. MLB umpiring is more erratic, but honestly everything about pro baseball has been erratic for years and they're certainly not a model anybody wants to copy.