Wouldn't it be a lot easier for teams to make adjustments when they see a knuckleballer twice in the same series? Not that it would happen every series, but every third or fourth one it would (I just took a final, don't give a s*** about figuring out the math).
Remember last year, when the biggest problem this time was figuring out what order our rotation was going to be? Knuckleballer, POWER, soft, POWER, whoever. Oh the good ol days.