The actual rule according to MLB.com lists it as, "A hitter may be designated to bat for the starting pitcher and all subsequent pitchers in any game without otherwise affecting the status of the pitcher(s) in the game"(6.10).
In today's game players are a lot bigger and stronger overall than they were over 30 years ago. When you also think that modern day players are making multi-million dollar contracts, they should be able to perform all aspects of the game. It seems that the rule no longer applies to baseball as it was intended. Anna Floch of MLB.com wrote that, "Proponents of the rule believe it has extended the career of players who would otherwise not have an opportunity to play because they are weak in the field or are plagued with injuries" (Floch). In other sports players retire when they are not able to perform in all areas of the game.
In the article "Pros and Cons of the DH" by Everett Merrill, he states that, "In reality, the designated hitter is now a critical position in the lineup" (22). Yet before this statement in the same article Merrill opens up with, "It seems like baseball's dream job. You get to concentrate on hitting, don't have to worry about making a costly error and when the game is over, you just pack up your bats and head back into the clubhouse" (22). That does not sound too much like a baseball player, as baseball involves catching and throwing as well as hitting. To pay players millions just to bat seems ridiculous were there are a lot more skills involved in playing baseball.
There just does not seem be very much said in the way of how the designated hitter has improved the attendance at ballparks in baseball. It may have increased the scores at one point in time, but again with the caliber of players in today's game, scoring comes from many positions. Teams seem to be moving away from offering the large long term contracts for players who are only able to hit.