Today there was a report from the AP which discussed a few potential changes to the game in the future. In the second half of the article, there was a discussion about how MLB could change the strike zone. Specifically, the zone could be raised from just below the knee to above the knee. This would all be in an attempt to bring more offense to the game, restoring the strike zone to an area it was prior to 1995, when the zone was lowered to the current level.
That adjustment isn't massive, and I personally think the bigger issue here is that umpires around the league do an absolute horrible job of calling the strike zone.