Interesting post/thread, you've certainly caught my attention to the other side of this as per your examples, as an old school fan, I'd certainly miss the umpire/pitcher/batter aspect of this, but many sports evolve to better the game to its true results. You've now truly f***ed up my brain, as I suck back some suds.
P.S. You'd think the "Union" of these umpires would sort this out, if not, they could become obsolete in regards of calls behind the plate, I mean, we already have video replay in the game, why not?