Your suggestion is impractical because MLB will never agree to it because the umpires won't. My guess,only that, is the MLB will also not want to automate calls on balls and strikes for the same reason.
I personally think umpires have improved in all respects. While I agree balls and strikes and still called incorrectly, I'm less sure of the 14% number because I believe in that grey area where a pitch can be called a ball or a strike without blaming the umpire for a mistake. If we accept that grey area of, say, 1-2 inches, my guess is the percentage of missed calls goes below 10%.
But even if it doesn't, I don't accept the notion that missed calls change the outcome of many games. Good pitchers can adapt to whatever the umpire is calling, and bad pitchers can't. Let's not forget that this thread began with the assumption that Sox pitchers would be beneficiaries of more strikes called--a more liberal (or more accurate, take your pick) strike zone. I personally think the Sox pitchers would not benefit as much as opposing pitchers who actually have good location and good action on the ball. Most of our guys can't throw a decent changeup. Most of our guys can't throw a breaking ball that goes anywhere near a corner--it's either way out of the strike zone or dead center. Most of our guys over-rely on the fast ball, the only pitch they can locate, so they need an umpire who will call strikes on pitches that are close.
Me, I'm an advocate of a liberal strike zone because I think walks are not good for the game. This is especially true in this era when commentators and others are saying that only worthwhile measure of hitting effectiveness is OBP, on base percentage, which causes batters to wait the pitcher out. I even find myself sometimes thinking that our hitters need to build up the pitch count of the other team's starter. But in fact it's a better game when hitters are more aggressive, which is true, surprisingly, of most our hitters right now. The problem, however, is that most hitters think it is their right and almost their obligation to disagree when a strike is called anywhere near the periphery of the strike zone. Pitchers and catchers,on the other hand, are discouraged from doing the reverse--complaining when a "good" pitch is called a ball. On top of that, I don't think MLB will ever do something that adversely affects hitting and scoring. My guess is MLB headquarters doesn't mind squeezing pitchers.