who could buzz down on obvious blown calls that can be fixed with minimum or no disruption.
The umps union should be OK with this, it increases jobs 25% and finds a place for the older guys to transition into retirement. Opens things up on the younger minor league guys, who need a pay bump BTW.
The dugouts will crane their necks and look upstairs rather than jaw with the field ump, maybe allowing some time and space for steam to blow off.
A 1-2 challenge per team per game system could work as well under certain circumstances. Balls / Strike No, Questec is grading umps now based on that.
Put some penalty for challenges not overturned so managers don't use them frivolously.
It's hard for me to imagine that a qualified experience ex-MLB ump in place near a replay booth couldn't have at first look, buzzed down and fixed the perfect game fiasco as well as many others.
Some will still get missed, deal with it.
Mark me down in favor of a challenge system + a fifth ump in the booth: