warmaker :
While I don't completely disagree, I don't think adding more challenges changes anything. From most games I've watched this year, there were enough challenges to make sure the right calls were made. And since managers CAN argue even if they are out of challenges, all it would take is a willingness by umpires to swallow their pride and admit they were wrong. By doing so, they go through the same process as the challenge system, without having to worry about the number of challenges remaining.
At any rate, the strike zone cannot and will not, ever be argued. They've made that very clear. Balls and strikes are NOT reviewable calls in any meaning of the word. And honestly, the effect they have on the game is a lot smaller than most people think.
For the most part, umpires do well with calling strike zones. There are 2-3 umpires in the game that routinely mess up calls (and should have been fired long ago), but they are the exception, not the rule. I draw strikezones in my spare time after ball games, I take it into a drawing application, like paint, and draw around the strikes, while trying to avoid called balls. In the end, I'm left with a lot of strikezones that end up looking like these.
These are not egregiously bad zones, and are fairly typical in today's game. Some calls are timely for a team, and have the other team crying foul, but to get even 99% of all ball strike calls right over a course of three hours, 162 games a year is nothing short of incredible. Umpires do not get enough credit for what they do.
The problem isn't the challenge system or the number of challenges a team gets (I say this as a fan of a team who has been screwed on challenges year round), nor is it a problem per say with the umpires themselves (they do rather well all things considered).
It's a lack of trust between managers/players and umpires. And that's more on the players and managers than the umpires. They always feel like the umpires are out to get them. There are some umpires who think the game is all about them, but those are the ones that should be fired, and are outside the curve to begin with.