I know we give the HP umpires lots of horsefeathers, it's got to be hard to call balls and strikes. Horizontally, no problem same for every hitter, vertically is were the difficulty comes in. It changes from batter to batter and the HP has to figure that out instantly, it can't be easy. That said, I'm all for removing umpires from the strike calling equation, they lack true consistency and they'll never have it because they're human.