Every Major League umpire has their own variation of the strike zone. I know it can be frustrating but it is the human element in the game; short of putting a robot back there options to standardize the strike zone are going to fall short.
For me I just want an umpire to be consistent. If a low pitch is going to be a strike, call it all game long. When I was a player, and now as a coach, an inconsistent strike zone is one of the more frustrating things in a ball game.
Overall I was really disappointed with the umpiring effort displayed in the 2011 postseason. I watched a bunch of games, from both leagues, and I was upset at the lack of consistency in the games. The strike zones were all over the place and the base umpires were not immune from bad calls too. It is hard to see a game’s outcome change because of a bad call, especially when the games are so crucial like in the postseason.