Just bring on the robo zone. No umps will lose their jobs as you still need an ump at the plate for many reasons. Umps will face a lot less criticism from fans, media, coaches, and players. MLB won't look as bad as it does now when you have blatantly, terrible calls changing the outcome of games. All sides win - MLB, MLBPA, and umps. I don't see how anyone could be against this.