Yeah, mlb replay is annoying since all they can do are true/not true calls (ie. can review whether it hit him, but cannot review "ump decision" plays like whether he leaned in or not).
Also I really wish they could get rid of these "it barely nicked his armor plating" type cases. Like, if you're wearing full body armor and it barely changes directions as it goes past, you get no credit for that. But I know that will never happen, since if you leave it to the ump, you'll have a case where a ball rams off the helmet and he'll call it a "deflection" and not credit them. Player safety and all that jazz. But man, so painful to see cases where I bet the player didn't even feel it give a win.