Traditionalists complain it will dilute ancient rivalries, screw up the year-to-year continuity of statistics, obliterate the quaint differences between the two leagues (principally, the designated-hitter rule), and spoil the climactic, virgin mystique of the World Series, which, until now, was the leagues' only intercourse.
Traditionalists complain that it will make the rivalries less intense because one team will be a powerhouse.